Specifics:
* Debian 12 has no longer the instantiated service using inet, see the
following commit:
0dc73888bb
* I am not matching the Description tag verbosely as I do not find it
crucial for functionality.
* We generate additional -f switch to the sshd CLI pointing go the main
sshd config we manage
* The Before=sshd.service in the socket is not generated as I find it
unnecessary when we conflict the service.
* Recent Ubuntu versions have RuntimeDirectoryPreserve option, which I
set for all Ubuntu/Debian as it should not hurt.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>