Description Florian Best 2023-09-05 13:37:35 CEST

https://git.knut.univention.de/univention/ucs/-/issues/1484

# What
Bump `debian/compat` respective `Build-Depends: debhelper-compat (= 13)` in `debian/control` to the level [debhelper](https://packages.debian.org/search?keywords=debhelper&searchon=sourcenames&suite=all&section=all&exact=1) in respective Debian suite:
- `8` Debian-8-Jessie
- `10` Debian-9-Stretch
- `12` Debian-10-Buster
- `13` Debian-11-Bullseye
- `13` Debian-12-Bookworm

# Why
- 121 UCS packages still use `9`, which was Debian-8-Jessie
- 1 UCS package uses `11`, which is *not recommended*
-  1+5=6 UCS package use `12`, which is Debian-10-Buster
- all previous levels have some strange behavior
- old levels are not supported by newer versions of `dh`

# How
- See <man:debhelper(7)> for a list of incompatible changes.
- For previous releases I re-built all packages with a newer `debhelper` level and compared the packages via [diffoscope](https://diffoscope.org/) to find differences, e.g. missing or moved files, changed behavior, …
- `rm debian/compat` and add `Build-Depends: debhelper-compat (= 13),` to `debian/control` instead.