Make the log output directory XDG compliant or configurable #402
Description
I noticed that the path to the log output for jack is hardcoded:
Line 713 in cc8576a
I know there is no $XDG_LOG_HOME in the standard so I suggest making it configurable through some custom environment variable like $JACKLOG or something and then falling back on $XDG_DATA_HOME/jack or $XDG_RUNTIME_DIR
spec:
https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html