Fix some issues reported by lintian

See merge request !10

Fixes lintian: debian-changelog-has-wrong-day-of-week
See https://lintian.debian.org/tags/debian-changelog-has-wrong-day-of-week.html for more details.

Fixes lintian: upstream-metadata-file-is-missing
See https://lintian.debian.org/tags/upstream-metadata-file-is-missing.html for more details.

Fixes lintian: package-uses-old-debhelper-compat-version
See https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html for more details.

Fix sys io

See merge request !9

again but this time well tested

Closes: #839161
Thanks: Emilio Pozuelo Monfort <pochu@debian.org> for proposing this approach

Update salsa-ci pipeline

See merge request !8

Gbp-Dch: Ignore

Gbp-Dch: Ignore

Update salsa-ci pipeline

See merge request !7

Gbp-Dch: Ignore

Update salsa-ci pipeline

See merge request !6

Enable reprotest again

See merge request !5

Gbp-Dch: Ignore

Gbp-Dch: (Closes: #839161)

Update salsa-ci pipeline

See merge request !4

diffoscope needs a looott of RAM

Gbp-Dch: Ignore

Add salsa ci

See merge request !2