Merge branch 'lintian-fixes' into 'master'

Fix some issues reported by lintian

See merge request !5

debian/compat

-11

debian/control

@@ -2,12 +2,13 @@ Source: postfix-policyd-proxy
 Section: unknown
 Priority: optional
 Maintainer: ale <ale@incal.net>
-Build-Depends: debhelper (>= 11), dh-golang, golang-any
+Build-Depends: debhelper-compat (= 12), dh-golang, golang-any
 Standards-Version: 4.1.3
 XS-Go-Import-Path: git.autistici.org/ai3/tools/postfix-policyd-proxy
 
 Package: postfix-policyd-proxy
 Architecture: any
 Depends: ${shlibs:Depends}, ${misc:Depends}
+Built-Using: ${misc:Built-Using}
 Description: Postfix policyd proxy
  Proxy for postfix policy services, directed by a LDAP backend.

debian/rules

@@ -9,4 +9,3 @@ export GO111MODULE := off
 
 override_dh_auto_install:
 	dh_auto_install -- --no-source
-