Upstream merge of Debian 2.42.1 packaging (no quilt patches)

Source has been updated with changes from git and we use the Debian
packaging data here to match those up.

[endlessm/eos-shell#3276]
@cosimoc dbus OBS update might need to drop 1 Collabora patch as it was in packaging (no clue what was changed) and references a bug number that doesn't exist in dbus nor systemd tracker. I'm hoping that the newer version "just works" here unless you have some ideas here that I could try.