Title: #5477: DEBUG: Use () in program identifier instead of 
To summarize, journald may be forwarded to syslog using rsyslog.
The older BSD-style RFC 3164 is used by it resulting in
For current code, that ends up being `sssd[sudo]:` from which some may parse PID as
This PR therefore proposed `sssd(sudo):` as a safer replacement, where parsing PID
always results with `1234`.
See the full comment at https://github.com/SSSD/sssd/pull/5477#issuecomment-772767111