Essentially, it will now process/parse priority values if they are
there, or else just accept whatever remaining data/text is there as the
syslog message. Reasoning is that there's syslog producers out there
that may have simply forgotten/neglected to send the priority value
and technically won't conform to what the standard says, though we can
infer the intent (some syslog consumers already may do similarly, but
I didn't verify).
