[feature request] session log to stdout/stderr/syslog

[yshui]

Right now sddm only supports logging to a file, so it can't benefit from the usual linux logging infrastructure (e.g. log rotation, log persistence - sddm will overwrite old log file, journald, to name a few).

logging to syslog would be very nice to have.

[Vogtinator]

SDDM uses journald logging by default. If that's not working for you, a build dependency might be missing.

[yshui]

sddm itself uses journald, but the session log doesn't.