Support logging to syslog

Simply set the logfile path to "syslog" and murmur will log to syslog.

This should be stable, it has approximately 4 user-months of testing.
Exactly.

>syslog recognizes one other facility code: that of the kernel. But you can't specify that facility code with these functions. If you try, it looks the same to syslog as if you are requesting the default facility. But you wouldn't want to anyway, because any program that uses the GNU C Library is not the kernel.