Update module github.com/oschwald/maxminddb-golang to v1.13.0

See merge request !7

Update module golang.org/x/crypto to v0.21.0

See merge request !5

Update git.autistici.org/ai3/go-common digest to b3aa3fb

See merge request !4

Configure Renovate

See merge request !3

IP wouldn't be shown if there was no additional location data.

It just means that we're being invoked for a non-SSH service.

Improve location data management

See merge request !2

Refactor authorized_keys support to match SSH functionality

See merge request !1

The --authorized-keys-file option now matches the syntax and semantics
of sshd AuthorizedKeysFile directive, token substitution and all.