syslog: don't generate clog files when disable_clog is set.
syslog: don't generate clog files when disable_clog is set.

eventually we should also prevent the legacy syslog from starting, but first make sure we don't polute the filesystem in these cases

opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core,opnsense/core