diff --git a/go.mod b/go.mod
index 6051076fb505f86c9ab1922996be25dc43395f09..dff213ea25fdb11352a7e0d9878c7f0775b2f0ac 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module git.autistici.org/id/keystore
 go 1.15
 
 require (
-	git.autistici.org/ai3/go-common v0.0.0-20210109170950-49f8d26bcc81
+	git.autistici.org/ai3/go-common v0.0.0-20210118064555-73f00db54723
 	git.autistici.org/id/go-sso v0.0.0-20181118174541-ad4e62357912
 	github.com/coreos/go-systemd/v22 v22.1.0
 	github.com/go-ldap/ldap/v3 v3.2.4
diff --git a/go.sum b/go.sum
index ca0d959811ea4a57f9ec66b47622b4e105a47e8c..ab69d956d607e4ba6a417c130f343d373222e6f4 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,8 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 contrib.go.opencensus.io/exporter/zipkin v0.1.2 h1:YqE293IZrKtqPnpwDPH/lOqTWD/s3Iwabycam74JV3g=
 contrib.go.opencensus.io/exporter/zipkin v0.1.2/go.mod h1:mP5xM3rrgOjpn79MM8fZbj3gsxcuytSqtH0dxSWW1RE=
-git.autistici.org/ai3/go-common v0.0.0-20210109170950-49f8d26bcc81 h1:p+NSXGJI+dyXsKHPsyrDeXIDXS0iBqsevv+F1N+eVJA=
-git.autistici.org/ai3/go-common v0.0.0-20210109170950-49f8d26bcc81/go.mod h1:nuLJyKZZaC3DBPN4gA1qdGXcm0U5WCcus1z3pI8RdTE=
+git.autistici.org/ai3/go-common v0.0.0-20210118064555-73f00db54723 h1:ylA6azCumIJnT7xb5hHrz0At6r1u3zqnugl1gB92KO0=
+git.autistici.org/ai3/go-common v0.0.0-20210118064555-73f00db54723/go.mod h1:T8BS+630KLzy30X2lshL98H0NW3Xuyzs8NI9D6C3New=
 git.autistici.org/id/go-sso v0.0.0-20181118174541-ad4e62357912 h1:1amb0pZr7c44TXSpFyb8q4J1+Ie+l7K1hYuXVD4zFrY=
 git.autistici.org/id/go-sso v0.0.0-20181118174541-ad4e62357912/go.mod h1:B9omXX7rw0qgWdBoF4RZnM7clwEVejoAe8oNJWETBZ0=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c h1:/IBSNwUN8+eKzUzbJPqhK839ygXJ82sde8x3ogr6R28=
@@ -38,6 +38,8 @@ github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kB
 github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
 github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff/v4 v4.1.0 h1:c8LkOFQTzuO0WBM/ae5HdGQuZPfPxp7lqBRwQRm4fSc=
+github.com/cenkalti/backoff/v4 v4.1.0/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -47,9 +49,8 @@ github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGX
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7 h1:u9SHYsPQNyt5tgDm3YN7+9dYrpK96E5wFilTFWIDZOM=
 github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf h1:iW4rZ826su+pqaw19uhpSCzhj44qo35pNgKFGqzDKkU=
-github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd/v22 v22.1.0 h1:kq/SbG2BCKLkDKkjQf5OWwKWUKj1lgs3lFI4PxnR5lg=
 github.com/coreos/go-systemd/v22 v22.1.0/go.mod h1:xO0FLkIi5MaZafQlIrOotqXZ90ih+1atmu1JpKERPPk=
 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
@@ -78,6 +79,8 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-asn1-ber/asn1-ber v1.5.1 h1:pDbRAunXzIUXfx4CB2QJFv5IuPiuoW+sWvr/Us009o8=
 github.com/go-asn1-ber/asn1-ber v1.5.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+github.com/go-asn1-ber/asn1-ber v1.5.3 h1:u7utq56RUFiynqUzgVMFDymapcOtQ/MZkh3H4QYkxag=
+github.com/go-asn1-ber/asn1-ber v1.5.3/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.10.0/go.mod h1:xUsJbQ/Fp4kEt7AFgCuvyX4a71u8h9jB8tj/ORgOZ7o=
@@ -455,8 +458,6 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
-gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d h1:TxyelI5cVkbREznMhfzycHdkp5cLA7DpE+GKjSslYhM=
-gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d/go.mod h1:cuepJuh7vyXfUyUwEgHQXw849cJrilpS5NeIjOWESAw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
diff --git a/vendor/git.autistici.org/ai3/go-common/clientutil/balancer.go b/vendor/git.autistici.org/ai3/go-common/clientutil/balancer.go
index b70602c8bea87bfb2d53c048163f0711f9ee4154..ca926d005409e25722bd7d820ca750dfeefdb4a3 100644
--- a/vendor/git.autistici.org/ai3/go-common/clientutil/balancer.go
+++ b/vendor/git.autistici.org/ai3/go-common/clientutil/balancer.go
@@ -16,7 +16,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/cenkalti/backoff"
+	"github.com/cenkalti/backoff/v4"
 )
 
 // Our own narrow logger interface.
diff --git a/vendor/git.autistici.org/ai3/go-common/go.mod b/vendor/git.autistici.org/ai3/go-common/go.mod
index b199aebd346d7710a10230627013e4eb57508013..8603ba3ebe97fb7378d41cf9056204d2444eb850 100644
--- a/vendor/git.autistici.org/ai3/go-common/go.mod
+++ b/vendor/git.autistici.org/ai3/go-common/go.mod
@@ -6,9 +6,10 @@ require (
 	contrib.go.opencensus.io/exporter/zipkin v0.1.2
 	github.com/amoghe/go-crypt v0.0.0-20191109212615-b2ff80594b7f
 	github.com/bbrks/wrap/v2 v2.5.0
-	github.com/cenkalti/backoff v2.2.1+incompatible
-	github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf
+	github.com/cenkalti/backoff/v4 v4.1.0
+	github.com/coreos/go-systemd/v22 v22.1.0
 	github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594
+	github.com/go-asn1-ber/asn1-ber v1.5.3
 	github.com/go-ldap/ldap/v3 v3.2.4
 	github.com/gofrs/flock v0.8.0 // indirect
 	github.com/google/go-cmp v0.5.4
@@ -18,11 +19,9 @@ require (
 	github.com/openzipkin/zipkin-go v0.2.5
 	github.com/prometheus/client_golang v1.9.0
 	github.com/russross/blackfriday/v2 v2.1.0
-	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/theckman/go-flock v0.8.0
 	github.com/tstranex/u2f v1.0.0
 	go.opencensus.io v0.22.5
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
-	gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d
 )
diff --git a/vendor/git.autistici.org/ai3/go-common/go.sum b/vendor/git.autistici.org/ai3/go-common/go.sum
index e550879deacc688890789de1c714b8a58e99f402..63cf02b1a549487e1c763111e84ff2c99b34bb46 100644
--- a/vendor/git.autistici.org/ai3/go-common/go.sum
+++ b/vendor/git.autistici.org/ai3/go-common/go.sum
@@ -1,218 +1,488 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-contrib.go.opencensus.io/exporter/zipkin v0.1.1 h1:PR+1zWqY8ceXs1qDQQIlgXe+sdiwCf0n32bH4+Epk8g=
-contrib.go.opencensus.io/exporter/zipkin v0.1.1/go.mod h1:GMvdSl3eJ2gapOaLKzTKE3qDgUkJ86k9k3yY2eqwkzc=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+contrib.go.opencensus.io/exporter/zipkin v0.1.2 h1:YqE293IZrKtqPnpwDPH/lOqTWD/s3Iwabycam74JV3g=
+contrib.go.opencensus.io/exporter/zipkin v0.1.2/go.mod h1:mP5xM3rrgOjpn79MM8fZbj3gsxcuytSqtH0dxSWW1RE=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c h1:/IBSNwUN8+eKzUzbJPqhK839ygXJ82sde8x3ogr6R28=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
+github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
+github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/amoghe/go-crypt v0.0.0-20191109212615-b2ff80594b7f h1:JxPBJknH9/9Yp0BPLZII8Cn4vaWPNsFOdkmpIwPhO8A=
 github.com/amoghe/go-crypt v0.0.0-20191109212615-b2ff80594b7f/go.mod h1:eFiR01PwTcpbzXtdMces7zxg6utvFM5puiWHpWB8D/k=
+github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
+github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
+github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
+github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/bbrks/wrap/v2 v2.5.0 h1:2gn3SiiwgttdyW9CFJz1M/WbDKPsN857x7Era5/oAPI=
 github.com/bbrks/wrap/v2 v2.5.0/go.mod h1:FdEamYFrsjX8zlv3UXgnT3JxirrDv67jCDYaE0Q/qww=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
 github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff/v4 v4.1.0 h1:c8LkOFQTzuO0WBM/ae5HdGQuZPfPxp7lqBRwQRm4fSc=
+github.com/cenkalti/backoff/v4 v4.1.0/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf h1:iW4rZ826su+pqaw19uhpSCzhj44qo35pNgKFGqzDKkU=
-github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
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 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
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+golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
 google.golang.org/grpc v1.20.1 h1:Hz2g2wirWK7H0qIIhGIqRGTuMwTE8HEKFnDZZ7lm9NU=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.30.0 h1:M5a8xTlYTxwMn5ZFkwhRabsygDY5G8TYLyQDBxJNAxE=
+google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
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+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
-gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d h1:TxyelI5cVkbREznMhfzycHdkp5cLA7DpE+GKjSslYhM=
-gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d/go.mod h1:cuepJuh7vyXfUyUwEgHQXw849cJrilpS5NeIjOWESAw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
diff --git a/vendor/git.autistici.org/ai3/go-common/ldap/pool.go b/vendor/git.autistici.org/ai3/go-common/ldap/pool.go
index 9092c364d935276dd43d9644c7440658eb57b982..a13887d3e190ab10da0462abf36e313677b936ac 100644
--- a/vendor/git.autistici.org/ai3/go-common/ldap/pool.go
+++ b/vendor/git.autistici.org/ai3/go-common/ldap/pool.go
@@ -7,7 +7,7 @@ import (
 	"net/url"
 	"time"
 
-	"github.com/cenkalti/backoff"
+	"github.com/cenkalti/backoff/v4"
 	"github.com/go-ldap/ldap/v3"
 	"github.com/prometheus/client_golang/prometheus"
 	"go.opencensus.io/trace"
diff --git a/vendor/git.autistici.org/ai3/go-common/serverutil/http.go b/vendor/git.autistici.org/ai3/go-common/serverutil/http.go
index afaadf44f355adc0e342b3c761b4ce888a0ba57a..692ec5b6fd5e6caf7e591721c0c44eb952a87e37 100644
--- a/vendor/git.autistici.org/ai3/go-common/serverutil/http.go
+++ b/vendor/git.autistici.org/ai3/go-common/serverutil/http.go
@@ -16,7 +16,7 @@ import (
 	"time"
 
 	"git.autistici.org/ai3/go-common/tracing"
-	"github.com/coreos/go-systemd/daemon"
+	"github.com/coreos/go-systemd/v22/daemon"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
diff --git a/vendor/git.autistici.org/ai3/go-common/unix/server.go b/vendor/git.autistici.org/ai3/go-common/unix/server.go
index 381d1415e90a705975eb84d035380ad66755667c..26ac8b94b892867e2abb02544d79688b59982a12 100644
--- a/vendor/git.autistici.org/ai3/go-common/unix/server.go
+++ b/vendor/git.autistici.org/ai3/go-common/unix/server.go
@@ -14,7 +14,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/coreos/go-systemd/activation"
+	"github.com/coreos/go-systemd/v22/activation"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/theckman/go-flock"
 )
diff --git a/vendor/github.com/cenkalti/backoff/.gitignore b/vendor/github.com/cenkalti/backoff/v4/.gitignore
similarity index 94%
rename from vendor/github.com/cenkalti/backoff/.gitignore
rename to vendor/github.com/cenkalti/backoff/v4/.gitignore
index 00268614f04567605359c96e714e834db9cebab6..50d95c548b67069b52ea4dcf91bf85314d488d41 100644
--- a/vendor/github.com/cenkalti/backoff/.gitignore
+++ b/vendor/github.com/cenkalti/backoff/v4/.gitignore
@@ -20,3 +20,6 @@ _cgo_export.*
 _testmain.go
 
 *.exe
+
+# IDEs
+.idea/
diff --git a/vendor/github.com/cenkalti/backoff/.travis.yml b/vendor/github.com/cenkalti/backoff/v4/.travis.yml
similarity index 95%
rename from vendor/github.com/cenkalti/backoff/.travis.yml
rename to vendor/github.com/cenkalti/backoff/v4/.travis.yml
index 47a6a46ec2ab601753b8d314b224c44d78cc85b0..c79105c2fbebe29ea2a4d735de58526f58a06815 100644
--- a/vendor/github.com/cenkalti/backoff/.travis.yml
+++ b/vendor/github.com/cenkalti/backoff/v4/.travis.yml
@@ -1,6 +1,6 @@
 language: go
 go:
-  - 1.7
+  - 1.13
   - 1.x
   - tip
 before_install:
diff --git a/vendor/github.com/cenkalti/backoff/LICENSE b/vendor/github.com/cenkalti/backoff/v4/LICENSE
similarity index 100%
rename from vendor/github.com/cenkalti/backoff/LICENSE
rename to vendor/github.com/cenkalti/backoff/v4/LICENSE
diff --git a/vendor/github.com/cenkalti/backoff/README.md b/vendor/github.com/cenkalti/backoff/v4/README.md
similarity index 81%
rename from vendor/github.com/cenkalti/backoff/README.md
rename to vendor/github.com/cenkalti/backoff/v4/README.md
index 55ebc98fc25faff08bf95f6a7f9d6a71ea652a35..16abdfc084f73cb6658c2ddf463ac02ff666dd6e 100644
--- a/vendor/github.com/cenkalti/backoff/README.md
+++ b/vendor/github.com/cenkalti/backoff/v4/README.md
@@ -9,7 +9,9 @@ The retries exponentially increase and stop increasing when a certain threshold
 
 ## Usage
 
-See https://godoc.org/github.com/cenkalti/backoff#pkg-examples
+Import path is `github.com/cenkalti/backoff/v4`. Please note the version part at the end.
+
+Use https://pkg.go.dev/github.com/cenkalti/backoff/v4 to view the documentation.
 
 ## Contributing
 
@@ -17,7 +19,7 @@ See https://godoc.org/github.com/cenkalti/backoff#pkg-examples
 * Please don't send a PR without opening an issue and discussing it first.
 * If proposed change is not a common use case, I will probably not accept it.
 
-[godoc]: https://godoc.org/github.com/cenkalti/backoff
+[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v4
 [godoc image]: https://godoc.org/github.com/cenkalti/backoff?status.png
 [travis]: https://travis-ci.org/cenkalti/backoff
 [travis image]: https://travis-ci.org/cenkalti/backoff.png?branch=master
@@ -27,4 +29,4 @@ See https://godoc.org/github.com/cenkalti/backoff#pkg-examples
 [google-http-java-client]: https://github.com/google/google-http-java-client/blob/da1aa993e90285ec18579f1553339b00e19b3ab5/google-http-client/src/main/java/com/google/api/client/util/ExponentialBackOff.java
 [exponential backoff wiki]: http://en.wikipedia.org/wiki/Exponential_backoff
 
-[advanced example]: https://godoc.org/github.com/cenkalti/backoff#example_
+[advanced example]: https://pkg.go.dev/github.com/cenkalti/backoff/v4?tab=doc#pkg-examples
diff --git a/vendor/github.com/cenkalti/backoff/backoff.go b/vendor/github.com/cenkalti/backoff/v4/backoff.go
similarity index 100%
rename from vendor/github.com/cenkalti/backoff/backoff.go
rename to vendor/github.com/cenkalti/backoff/v4/backoff.go
diff --git a/vendor/github.com/cenkalti/backoff/context.go b/vendor/github.com/cenkalti/backoff/v4/context.go
similarity index 77%
rename from vendor/github.com/cenkalti/backoff/context.go
rename to vendor/github.com/cenkalti/backoff/v4/context.go
index 7706faa2b6005710090d1c047cb60807bbea4468..fcff86c1b3de82ed74f86ea9576711dd0aa27d31 100644
--- a/vendor/github.com/cenkalti/backoff/context.go
+++ b/vendor/github.com/cenkalti/backoff/v4/context.go
@@ -7,7 +7,7 @@ import (
 
 // BackOffContext is a backoff policy that stops retrying after the context
 // is canceled.
-type BackOffContext interface {
+type BackOffContext interface { // nolint: golint
 	BackOff
 	Context() context.Context
 }
@@ -20,7 +20,7 @@ type backOffContext struct {
 // WithContext returns a BackOffContext with context ctx
 //
 // ctx must not be nil
-func WithContext(b BackOff, ctx context.Context) BackOffContext {
+func WithContext(b BackOff, ctx context.Context) BackOffContext { // nolint: golint
 	if ctx == nil {
 		panic("nil context")
 	}
@@ -38,11 +38,14 @@ func WithContext(b BackOff, ctx context.Context) BackOffContext {
 	}
 }
 
-func ensureContext(b BackOff) BackOffContext {
+func getContext(b BackOff) context.Context {
 	if cb, ok := b.(BackOffContext); ok {
-		return cb
+		return cb.Context()
 	}
-	return WithContext(b, context.Background())
+	if tb, ok := b.(*backOffTries); ok {
+		return getContext(tb.delegate)
+	}
+	return context.Background()
 }
 
 func (b *backOffContext) Context() context.Context {
@@ -56,7 +59,7 @@ func (b *backOffContext) NextBackOff() time.Duration {
 	default:
 	}
 	next := b.BackOff.NextBackOff()
-	if deadline, ok := b.ctx.Deadline(); ok && deadline.Sub(time.Now()) < next {
+	if deadline, ok := b.ctx.Deadline(); ok && deadline.Sub(time.Now()) < next { // nolint: gosimple
 		return Stop
 	}
 	return next
diff --git a/vendor/github.com/cenkalti/backoff/exponential.go b/vendor/github.com/cenkalti/backoff/v4/exponential.go
similarity index 89%
rename from vendor/github.com/cenkalti/backoff/exponential.go
rename to vendor/github.com/cenkalti/backoff/v4/exponential.go
index a031a659799fc24fc0d368de9c9bf83bfbbe5952..3d3453215bb3068783e46aeb6039e4b6a06618e8 100644
--- a/vendor/github.com/cenkalti/backoff/exponential.go
+++ b/vendor/github.com/cenkalti/backoff/v4/exponential.go
@@ -56,9 +56,10 @@ type ExponentialBackOff struct {
 	RandomizationFactor float64
 	Multiplier          float64
 	MaxInterval         time.Duration
-	// After MaxElapsedTime the ExponentialBackOff stops.
+	// After MaxElapsedTime the ExponentialBackOff returns Stop.
 	// It never stops if MaxElapsedTime == 0.
 	MaxElapsedTime time.Duration
+	Stop           time.Duration
 	Clock          Clock
 
 	currentInterval time.Duration
@@ -87,6 +88,7 @@ func NewExponentialBackOff() *ExponentialBackOff {
 		Multiplier:          DefaultMultiplier,
 		MaxInterval:         DefaultMaxInterval,
 		MaxElapsedTime:      DefaultMaxElapsedTime,
+		Stop:                Stop,
 		Clock:               SystemClock,
 	}
 	b.Reset()
@@ -103,20 +105,23 @@ func (t systemClock) Now() time.Time {
 var SystemClock = systemClock{}
 
 // Reset the interval back to the initial retry interval and restarts the timer.
+// Reset must be called before using b.
 func (b *ExponentialBackOff) Reset() {
 	b.currentInterval = b.InitialInterval
 	b.startTime = b.Clock.Now()
 }
 
 // NextBackOff calculates the next backoff interval using the formula:
-// 	Randomized interval = RetryInterval +/- (RandomizationFactor * RetryInterval)
+// 	Randomized interval = RetryInterval * (1 ± RandomizationFactor)
 func (b *ExponentialBackOff) NextBackOff() time.Duration {
 	// Make sure we have not gone over the maximum elapsed time.
-	if b.MaxElapsedTime != 0 && b.GetElapsedTime() > b.MaxElapsedTime {
-		return Stop
+	elapsed := b.GetElapsedTime()
+	next := getRandomValueFromInterval(b.RandomizationFactor, rand.Float64(), b.currentInterval)
+	b.incrementCurrentInterval()
+	if b.MaxElapsedTime != 0 && elapsed+next > b.MaxElapsedTime {
+		return b.Stop
 	}
-	defer b.incrementCurrentInterval()
-	return getRandomValueFromInterval(b.RandomizationFactor, rand.Float64(), b.currentInterval)
+	return next
 }
 
 // GetElapsedTime returns the elapsed time since an ExponentialBackOff instance
@@ -140,7 +145,7 @@ func (b *ExponentialBackOff) incrementCurrentInterval() {
 }
 
 // Returns a random value from the following interval:
-// 	[randomizationFactor * currentInterval, randomizationFactor * currentInterval].
+// 	[currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval].
 func getRandomValueFromInterval(randomizationFactor, random float64, currentInterval time.Duration) time.Duration {
 	var delta = randomizationFactor * float64(currentInterval)
 	var minInterval = float64(currentInterval) - delta
diff --git a/vendor/github.com/cenkalti/backoff/v4/go.mod b/vendor/github.com/cenkalti/backoff/v4/go.mod
new file mode 100644
index 0000000000000000000000000000000000000000..f811bead99fd33a45a84cbf12c800ade0a4fc832
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/go.mod
@@ -0,0 +1,3 @@
+module github.com/cenkalti/backoff/v4
+
+go 1.13
diff --git a/vendor/github.com/cenkalti/backoff/retry.go b/vendor/github.com/cenkalti/backoff/v4/retry.go
similarity index 60%
rename from vendor/github.com/cenkalti/backoff/retry.go
rename to vendor/github.com/cenkalti/backoff/v4/retry.go
index e936a506f849396e15a4684ad51ce5692b82b4f9..73234a464b9aec8b9f94928fdec6dc56789073af 100644
--- a/vendor/github.com/cenkalti/backoff/retry.go
+++ b/vendor/github.com/cenkalti/backoff/v4/retry.go
@@ -1,6 +1,9 @@
 package backoff
 
-import "time"
+import (
+	"errors"
+	"time"
+)
 
 // An Operation is executing by Retry() or RetryNotify().
 // The operation will be retried using a backoff policy if it returns an error.
@@ -21,16 +24,31 @@ type Notify func(error, time.Duration)
 //
 // Retry sleeps the goroutine for the duration returned by BackOff after a
 // failed operation returns.
-func Retry(o Operation, b BackOff) error { return RetryNotify(o, b, nil) }
+func Retry(o Operation, b BackOff) error {
+	return RetryNotify(o, b, nil)
+}
 
 // RetryNotify calls notify function with the error and wait duration
 // for each failed attempt before sleep.
 func RetryNotify(operation Operation, b BackOff, notify Notify) error {
+	return RetryNotifyWithTimer(operation, b, notify, nil)
+}
+
+// RetryNotifyWithTimer calls notify function with the error and wait duration using the given Timer
+// for each failed attempt before sleep.
+// A default timer that uses system timer is used when nil is passed.
+func RetryNotifyWithTimer(operation Operation, b BackOff, notify Notify, t Timer) error {
 	var err error
 	var next time.Duration
-	var t *time.Timer
+	if t == nil {
+		t = &defaultTimer{}
+	}
+
+	defer func() {
+		t.Stop()
+	}()
 
-	cb := ensureContext(b)
+	ctx := getContext(b)
 
 	b.Reset()
 	for {
@@ -38,11 +56,12 @@ func RetryNotify(operation Operation, b BackOff, notify Notify) error {
 			return nil
 		}
 
-		if permanent, ok := err.(*PermanentError); ok {
+		var permanent *PermanentError
+		if errors.As(err, &permanent) {
 			return permanent.Err
 		}
 
-		if next = cb.NextBackOff(); next == Stop {
+		if next = b.NextBackOff(); next == Stop {
 			return err
 		}
 
@@ -50,17 +69,12 @@ func RetryNotify(operation Operation, b BackOff, notify Notify) error {
 			notify(err, next)
 		}
 
-		if t == nil {
-			t = time.NewTimer(next)
-			defer t.Stop()
-		} else {
-			t.Reset(next)
-		}
+		t.Start(next)
 
 		select {
-		case <-cb.Context().Done():
-			return err
-		case <-t.C:
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-t.C():
 		}
 	}
 }
@@ -74,8 +88,20 @@ func (e *PermanentError) Error() string {
 	return e.Err.Error()
 }
 
+func (e *PermanentError) Unwrap() error {
+	return e.Err
+}
+
+func (e *PermanentError) Is(target error) bool {
+	_, ok := target.(*PermanentError)
+	return ok
+}
+
 // Permanent wraps the given err in a *PermanentError.
-func Permanent(err error) *PermanentError {
+func Permanent(err error) error {
+	if err == nil {
+		return nil
+	}
 	return &PermanentError{
 		Err: err,
 	}
diff --git a/vendor/github.com/cenkalti/backoff/ticker.go b/vendor/github.com/cenkalti/backoff/v4/ticker.go
similarity index 74%
rename from vendor/github.com/cenkalti/backoff/ticker.go
rename to vendor/github.com/cenkalti/backoff/v4/ticker.go
index e41084b0eff94364e0c40333dede3f1594b46207..df9d68bce527f2952dd8a6b4569fff26b6c214c2 100644
--- a/vendor/github.com/cenkalti/backoff/ticker.go
+++ b/vendor/github.com/cenkalti/backoff/v4/ticker.go
@@ -1,6 +1,7 @@
 package backoff
 
 import (
+	"context"
 	"sync"
 	"time"
 )
@@ -12,7 +13,9 @@ import (
 type Ticker struct {
 	C        <-chan time.Time
 	c        chan time.Time
-	b        BackOffContext
+	b        BackOff
+	ctx      context.Context
+	timer    Timer
 	stop     chan struct{}
 	stopOnce sync.Once
 }
@@ -24,12 +27,23 @@ type Ticker struct {
 // provided backoff policy (notably calling NextBackOff or Reset)
 // while the ticker is running.
 func NewTicker(b BackOff) *Ticker {
+	return NewTickerWithTimer(b, &defaultTimer{})
+}
+
+// NewTickerWithTimer returns a new Ticker with a custom timer.
+// A default timer that uses system timer is used when nil is passed.
+func NewTickerWithTimer(b BackOff, timer Timer) *Ticker {
+	if timer == nil {
+		timer = &defaultTimer{}
+	}
 	c := make(chan time.Time)
 	t := &Ticker{
-		C:    c,
-		c:    c,
-		b:    ensureContext(b),
-		stop: make(chan struct{}),
+		C:     c,
+		c:     c,
+		b:     b,
+		ctx:   getContext(b),
+		timer: timer,
+		stop:  make(chan struct{}),
 	}
 	t.b.Reset()
 	go t.run()
@@ -59,7 +73,7 @@ func (t *Ticker) run() {
 		case <-t.stop:
 			t.c = nil // Prevent future ticks from being sent to the channel.
 			return
-		case <-t.b.Context().Done():
+		case <-t.ctx.Done():
 			return
 		}
 	}
@@ -78,5 +92,6 @@ func (t *Ticker) send(tick time.Time) <-chan time.Time {
 		return nil
 	}
 
-	return time.After(next)
+	t.timer.Start(next)
+	return t.timer.C()
 }
diff --git a/vendor/github.com/cenkalti/backoff/v4/timer.go b/vendor/github.com/cenkalti/backoff/v4/timer.go
new file mode 100644
index 0000000000000000000000000000000000000000..8120d0213c58d550ea7cf20ab4d2329134abb12a
--- /dev/null
+++ b/vendor/github.com/cenkalti/backoff/v4/timer.go
@@ -0,0 +1,35 @@
+package backoff
+
+import "time"
+
+type Timer interface {
+	Start(duration time.Duration)
+	Stop()
+	C() <-chan time.Time
+}
+
+// defaultTimer implements Timer interface using time.Timer
+type defaultTimer struct {
+	timer *time.Timer
+}
+
+// C returns the timers channel which receives the current time when the timer fires.
+func (t *defaultTimer) C() <-chan time.Time {
+	return t.timer.C
+}
+
+// Start starts the timer to fire after the given duration
+func (t *defaultTimer) Start(duration time.Duration) {
+	if t.timer == nil {
+		t.timer = time.NewTimer(duration)
+	} else {
+		t.timer.Reset(duration)
+	}
+}
+
+// Stop is called when the timer is not used anymore and resources may be freed.
+func (t *defaultTimer) Stop() {
+	if t.timer != nil {
+		t.timer.Stop()
+	}
+}
diff --git a/vendor/github.com/cenkalti/backoff/tries.go b/vendor/github.com/cenkalti/backoff/v4/tries.go
similarity index 94%
rename from vendor/github.com/cenkalti/backoff/tries.go
rename to vendor/github.com/cenkalti/backoff/v4/tries.go
index cfeefd9b764c4272f518e7db3331c31a35d84834..28d58ca37c684020e7db4e1f5a1394cc4b4edef9 100644
--- a/vendor/github.com/cenkalti/backoff/tries.go
+++ b/vendor/github.com/cenkalti/backoff/v4/tries.go
@@ -20,6 +20,9 @@ type backOffTries struct {
 }
 
 func (b *backOffTries) NextBackOff() time.Duration {
+	if b.maxTries == 0 {
+		return Stop
+	}
 	if b.maxTries > 0 {
 		if b.maxTries <= b.numTries {
 			return Stop
diff --git a/vendor/github.com/coreos/go-systemd/LICENSE b/vendor/github.com/coreos/go-systemd/LICENSE
deleted file mode 100644
index 37ec93a14fdcd0d6e525d97c0cfa6b314eaa98d8..0000000000000000000000000000000000000000
--- a/vendor/github.com/coreos/go-systemd/LICENSE
+++ /dev/null
@@ -1,191 +0,0 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-"License" shall mean the terms and conditions for use, reproduction, and
-distribution as defined by Sections 1 through 9 of this document.
-
-"Licensor" shall mean the copyright owner or entity authorized by the copyright
-owner that is granting the License.
-
-"Legal Entity" shall mean the union of the acting entity and all other entities
-that control, are controlled by, or are under common control with that entity.
-For the purposes of this definition, "control" means (i) the power, direct or
-indirect, to cause the direction or management of such entity, whether by
-contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the
-outstanding shares, or (iii) beneficial ownership of such entity.
-
-"You" (or "Your") shall mean an individual or Legal Entity exercising
-permissions granted by this License.
-
-"Source" form shall mean the preferred form for making modifications, including
-but not limited to software source code, documentation source, and configuration
-files.
-
-"Object" form shall mean any form resulting from mechanical transformation or
-translation of a Source form, including but not limited to compiled object code,
-generated documentation, and conversions to other media types.
-
-"Work" shall mean the work of authorship, whether in Source or Object form, made
-available under the License, as indicated by a copyright notice that is included
-in or attached to the work (an example is provided in the Appendix below).
-
-"Derivative Works" shall mean any work, whether in Source or Object form, that
-is based on (or derived from) the Work and for which the editorial revisions,
-annotations, elaborations, or other modifications represent, as a whole, an
-original work of authorship. For the purposes of this License, Derivative Works
-shall not include works that remain separable from, or merely link (or bind by
-name) to the interfaces of, the Work and Derivative Works thereof.
-
-"Contribution" shall mean any work of authorship, including the original version
-of the Work and any modifications or additions to that Work or Derivative Works
-thereof, that is intentionally submitted to Licensor for inclusion in the Work
-by the copyright owner or by an individual or Legal Entity authorized to submit
-on behalf of the copyright owner. For the purposes of this definition,
-"submitted" means any form of electronic, verbal, or written communication sent
-to the Licensor or its representatives, including but not limited to
-communication on electronic mailing lists, source code control systems, and
-issue tracking systems that are managed by, or on behalf of, the Licensor for
-the purpose of discussing and improving the Work, but excluding communication
-that is conspicuously marked or otherwise designated in writing by the copyright
-owner as "Not a Contribution."
-
-"Contributor" shall mean Licensor and any individual or Legal Entity on behalf
-of whom a Contribution has been received by Licensor and subsequently
-incorporated within the Work.
-
-2. Grant of Copyright License.
-
-Subject to the terms and conditions of this License, each Contributor hereby
-grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
-irrevocable copyright license to reproduce, prepare Derivative Works of,
-publicly display, publicly perform, sublicense, and distribute the Work and such
-Derivative Works in Source or Object form.
-
-3. Grant of Patent License.
-
-Subject to the terms and conditions of this License, each Contributor hereby
-grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
-irrevocable (except as stated in this section) patent license to make, have
-made, use, offer to sell, sell, import, and otherwise transfer the Work, where
-such license applies only to those patent claims licensable by such Contributor
-that are necessarily infringed by their Contribution(s) alone or by combination
-of their Contribution(s) with the Work to which such Contribution(s) was
-submitted. If You institute patent litigation against any entity (including a
-cross-claim or counterclaim in a lawsuit) alleging that the Work or a
-Contribution incorporated within the Work constitutes direct or contributory
-patent infringement, then any patent licenses granted to You under this License
-for that Work shall terminate as of the date such litigation is filed.
-
-4. Redistribution.
-
-You may reproduce and distribute copies of the Work or Derivative Works thereof
-in any medium, with or without modifications, and in Source or Object form,
-provided that You meet the following conditions:
-
-You must give any other recipients of the Work or Derivative Works a copy of
-this License; and
-You must cause any modified files to carry prominent notices stating that You
-changed the files; and
-You must retain, in the Source form of any Derivative Works that You distribute,
-all copyright, patent, trademark, and attribution notices from the Source form
-of the Work, excluding those notices that do not pertain to any part of the
-Derivative Works; and
-If the Work includes a "NOTICE" text file as part of its distribution, then any
-Derivative Works that You distribute must include a readable copy of the
-attribution notices contained within such NOTICE file, excluding those notices
-that do not pertain to any part of the Derivative Works, in at least one of the
-following places: within a NOTICE text file distributed as part of the
-Derivative Works; within the Source form or documentation, if provided along
-with the Derivative Works; or, within a display generated by the Derivative
-Works, if and wherever such third-party notices normally appear. The contents of
-the NOTICE file are for informational purposes only and do not modify the
-License. You may add Your own attribution notices within Derivative Works that
-You distribute, alongside or as an addendum to the NOTICE text from the Work,
-provided that such additional attribution notices cannot be construed as
-modifying the License.
-You may add Your own copyright statement to Your modifications and may provide
-additional or different license terms and conditions for use, reproduction, or
-distribution of Your modifications, or for any such Derivative Works as a whole,
-provided Your use, reproduction, and distribution of the Work otherwise complies
-with the conditions stated in this License.
-
-5. Submission of Contributions.
-
-Unless You explicitly state otherwise, any Contribution intentionally submitted
-for inclusion in the Work by You to the Licensor shall be under the terms and
-conditions of this License, without any additional terms or conditions.
-Notwithstanding the above, nothing herein shall supersede or modify the terms of
-any separate license agreement you may have executed with Licensor regarding
-such Contributions.
-
-6. Trademarks.
-
-This License does not grant permission to use the trade names, trademarks,
-service marks, or product names of the Licensor, except as required for
-reasonable and customary use in describing the origin of the Work and
-reproducing the content of the NOTICE file.
-
-7. Disclaimer of Warranty.
-
-Unless required by applicable law or agreed to in writing, Licensor provides the
-Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
-including, without limitation, any warranties or conditions of TITLE,
-NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
-solely responsible for determining the appropriateness of using or
-redistributing the Work and assume any risks associated with Your exercise of
-permissions under this License.
-
-8. Limitation of Liability.
-
-In no event and under no legal theory, whether in tort (including negligence),
-contract, or otherwise, unless required by applicable law (such as deliberate
-and grossly negligent acts) or agreed to in writing, shall any Contributor be
-liable to You for damages, including any direct, indirect, special, incidental,
-or consequential damages of any character arising as a result of this License or
-out of the use or inability to use the Work (including but not limited to
-damages for loss of goodwill, work stoppage, computer failure or malfunction, or
-any and all other commercial damages or losses), even if such Contributor has
-been advised of the possibility of such damages.
-
-9. Accepting Warranty or Additional Liability.
-
-While redistributing the Work or Derivative Works thereof, You may choose to
-offer, and charge a fee for, acceptance of support, warranty, indemnity, or
-other liability obligations and/or rights consistent with this License. However,
-in accepting such obligations, You may act only on Your own behalf and on Your
-sole responsibility, not on behalf of any other Contributor, and only if You
-agree to indemnify, defend, and hold each Contributor harmless for any liability
-incurred by, or claims asserted against, such Contributor by reason of your
-accepting any such warranty or additional liability.
-
-END OF TERMS AND CONDITIONS
-
-APPENDIX: How to apply the Apache License to your work
-
-To apply the Apache License to your work, attach the following boilerplate
-notice, with the fields enclosed by brackets "[]" replaced with your own
-identifying information. (Don't include the brackets!) The text should be
-enclosed in the appropriate comment syntax for the file format. We also
-recommend that a file or class name and description of purpose be included on
-the same "printed page" as the copyright notice for easier identification within
-third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/vendor/github.com/coreos/go-systemd/NOTICE b/vendor/github.com/coreos/go-systemd/NOTICE
deleted file mode 100644
index 23a0ada2fbb5635786d4bb9672c421010369d767..0000000000000000000000000000000000000000
--- a/vendor/github.com/coreos/go-systemd/NOTICE
+++ /dev/null
@@ -1,5 +0,0 @@
-CoreOS Project
-Copyright 2018 CoreOS, Inc
-
-This product includes software developed at CoreOS, Inc.
-(http://www.coreos.com/).
diff --git a/vendor/github.com/coreos/go-systemd/daemon/sdnotify.go b/vendor/github.com/coreos/go-systemd/daemon/sdnotify.go
deleted file mode 100644
index ba4ae31f19baedfaaab7c77e1f2705147d51c578..0000000000000000000000000000000000000000
--- a/vendor/github.com/coreos/go-systemd/daemon/sdnotify.go
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2014 Docker, Inc.
-// Copyright 2015-2018 CoreOS, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// Package daemon provides a Go implementation of the sd_notify protocol.
-// It can be used to inform systemd of service start-up completion, watchdog
-// events, and other status changes.
-//
-// https://www.freedesktop.org/software/systemd/man/sd_notify.html#Description
-package daemon
-
-import (
-	"net"
-	"os"
-)
-
-const (
-	// SdNotifyReady tells the service manager that service startup is finished
-	// or the service finished loading its configuration.
-	SdNotifyReady = "READY=1"
-
-	// SdNotifyStopping tells the service manager that the service is beginning
-	// its shutdown.
-	SdNotifyStopping = "STOPPING=1"
-
-	// SdNotifyReloading tells the service manager that this service is
-	// reloading its configuration. Note that you must call SdNotifyReady when
-	// it completed reloading.
-	SdNotifyReloading = "RELOADING=1"
-
-	// SdNotifyWatchdog tells the service manager to update the watchdog
-	// timestamp for the service.
-	SdNotifyWatchdog = "WATCHDOG=1"
-)
-
-// SdNotify sends a message to the init daemon. It is common to ignore the error.
-// If `unsetEnvironment` is true, the environment variable `NOTIFY_SOCKET`
-// will be unconditionally unset.
-//
-// It returns one of the following:
-// (false, nil) - notification not supported (i.e. NOTIFY_SOCKET is unset)
-// (false, err) - notification supported, but failure happened (e.g. error connecting to NOTIFY_SOCKET or while sending data)
-// (true, nil) - notification supported, data has been sent
-func SdNotify(unsetEnvironment bool, state string) (bool, error) {
-	socketAddr := &net.UnixAddr{
-		Name: os.Getenv("NOTIFY_SOCKET"),
-		Net:  "unixgram",
-	}
-
-	// NOTIFY_SOCKET not set
-	if socketAddr.Name == "" {
-		return false, nil
-	}
-
-	if unsetEnvironment {
-		if err := os.Unsetenv("NOTIFY_SOCKET"); err != nil {
-			return false, err
-		}
-	}
-
-	conn, err := net.DialUnix(socketAddr.Net, nil, socketAddr)
-	// Error connecting to NOTIFY_SOCKET
-	if err != nil {
-		return false, err
-	}
-	defer conn.Close()
-
-	if _, err = conn.Write([]byte(state)); err != nil {
-		return false, err
-	}
-	return true, nil
-}
diff --git a/vendor/github.com/coreos/go-systemd/daemon/watchdog.go b/vendor/github.com/coreos/go-systemd/daemon/watchdog.go
deleted file mode 100644
index 7a0e0d3a51b1412884b32bb93b66960a7f157550..0000000000000000000000000000000000000000
--- a/vendor/github.com/coreos/go-systemd/daemon/watchdog.go
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright 2016 CoreOS, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package daemon
-
-import (
-	"fmt"
-	"os"
-	"strconv"
-	"time"
-)
-
-// SdWatchdogEnabled returns watchdog information for a service.
-// Processes should call daemon.SdNotify(false, daemon.SdNotifyWatchdog) every
-// time / 2.
-// If `unsetEnvironment` is true, the environment variables `WATCHDOG_USEC` and
-// `WATCHDOG_PID` will be unconditionally unset.
-//
-// It returns one of the following:
-// (0, nil) - watchdog isn't enabled or we aren't the watched PID.
-// (0, err) - an error happened (e.g. error converting time).
-// (time, nil) - watchdog is enabled and we can send ping.
-//   time is delay before inactive service will be killed.
-func SdWatchdogEnabled(unsetEnvironment bool) (time.Duration, error) {
-	wusec := os.Getenv("WATCHDOG_USEC")
-	wpid := os.Getenv("WATCHDOG_PID")
-	if unsetEnvironment {
-		wusecErr := os.Unsetenv("WATCHDOG_USEC")
-		wpidErr := os.Unsetenv("WATCHDOG_PID")
-		if wusecErr != nil {
-			return 0, wusecErr
-		}
-		if wpidErr != nil {
-			return 0, wpidErr
-		}
-	}
-
-	if wusec == "" {
-		return 0, nil
-	}
-	s, err := strconv.Atoi(wusec)
-	if err != nil {
-		return 0, fmt.Errorf("error converting WATCHDOG_USEC: %s", err)
-	}
-	if s <= 0 {
-		return 0, fmt.Errorf("error WATCHDOG_USEC must be a positive number")
-	}
-	interval := time.Duration(s) * time.Microsecond
-
-	if wpid == "" {
-		return interval, nil
-	}
-	p, err := strconv.Atoi(wpid)
-	if err != nil {
-		return 0, fmt.Errorf("error converting WATCHDOG_PID: %s", err)
-	}
-	if os.Getpid() != p {
-		return 0, nil
-	}
-
-	return interval, nil
-}
diff --git a/vendor/github.com/coreos/go-systemd/activation/files.go b/vendor/github.com/coreos/go-systemd/v22/activation/files.go
similarity index 100%
rename from vendor/github.com/coreos/go-systemd/activation/files.go
rename to vendor/github.com/coreos/go-systemd/v22/activation/files.go
diff --git a/vendor/github.com/coreos/go-systemd/activation/listeners.go b/vendor/github.com/coreos/go-systemd/v22/activation/listeners.go
similarity index 100%
rename from vendor/github.com/coreos/go-systemd/activation/listeners.go
rename to vendor/github.com/coreos/go-systemd/v22/activation/listeners.go
diff --git a/vendor/github.com/coreos/go-systemd/activation/packetconns.go b/vendor/github.com/coreos/go-systemd/v22/activation/packetconns.go
similarity index 100%
rename from vendor/github.com/coreos/go-systemd/activation/packetconns.go
rename to vendor/github.com/coreos/go-systemd/v22/activation/packetconns.go
diff --git a/vendor/github.com/go-asn1-ber/asn1-ber/.travis.yml b/vendor/github.com/go-asn1-ber/asn1-ber/.travis.yml
index 8bffb901704beef390b3eb68d04b93cbdd40b0bf..764b541886e91eaa1a00aec4f5a38507b3481313 100644
--- a/vendor/github.com/go-asn1-ber/asn1-ber/.travis.yml
+++ b/vendor/github.com/go-asn1-ber/asn1-ber/.travis.yml
@@ -15,6 +15,7 @@ os:
 
 arch:
   - amd64
+  - ppc64le
 
 dist: xenial
 
@@ -37,3 +38,6 @@ jobs:
 
 script:
   - go test -v -cover ./... || go test -v ./...
+matrix:
+ allowfailures:
+  go: 1.2.x
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d2e7e931e2e181759c93e825a38c2e8a2c3a8669..e2627021ad65358df143d2bcf0a0ccd0c43e84ae 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,6 +1,6 @@
 # contrib.go.opencensus.io/exporter/zipkin v0.1.2
 contrib.go.opencensus.io/exporter/zipkin
-# git.autistici.org/ai3/go-common v0.0.0-20210109170950-49f8d26bcc81
+# git.autistici.org/ai3/go-common v0.0.0-20210118064555-73f00db54723
 ## explicit
 git.autistici.org/ai3/go-common
 git.autistici.org/ai3/go-common/clientutil
@@ -17,19 +17,17 @@ git.autistici.org/id/go-sso
 github.com/Azure/go-ntlmssp
 # github.com/beorn7/perks v1.0.1
 github.com/beorn7/perks/quantile
-# github.com/cenkalti/backoff v2.2.1+incompatible
-github.com/cenkalti/backoff
+# github.com/cenkalti/backoff/v4 v4.1.0
+github.com/cenkalti/backoff/v4
 # github.com/cespare/xxhash/v2 v2.1.1
 github.com/cespare/xxhash/v2
-# github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf
-github.com/coreos/go-systemd/activation
-github.com/coreos/go-systemd/daemon
 # github.com/coreos/go-systemd/v22 v22.1.0
 ## explicit
+github.com/coreos/go-systemd/v22/activation
 github.com/coreos/go-systemd/v22/daemon
 # github.com/felixge/httpsnoop v1.0.1
 github.com/felixge/httpsnoop
-# github.com/go-asn1-ber/asn1-ber v1.5.1
+# github.com/go-asn1-ber/asn1-ber v1.5.3
 github.com/go-asn1-ber/asn1-ber
 # github.com/go-ldap/ldap/v3 v3.2.4
 ## explicit