The option was introduced in 6bb0d7b456
without documentation and intended use. The recent change
f6ae2094fe propagated this option to the
generated service files, which is resulting in unexpected results, when
a user decided to set only `sshd_config_file` for the second sshd
service causing the service file points to the system-wide
configuration file.
This is an attempt to fix this by introducing some heuristics to guess
if the user wants to set up second drop-in directory (ending with .d)
or create a standalone configuration file.
Fixes: #280
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>