Merge branch 'lintian-fixes' into 'master'

Fix some issues reported by lintian

See merge request !1
8 jobs for master in 7 minutes and 9 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #290737
build

00:03:08

 
  Test
passed #290742
autopkgtest

00:03:59

passed #290743
blhc

00:01:19

passed #290741
lintian

00:01:37

passed #290744
piuparts

00:03:25

passed #290740
reprotest

00:02:34

passed #290739
test-build-all

00:02:58

passed #290738
test-build-any

00:02:12