Substantial changes to better support Solaris and BSD variants.

Removed CODE, as its definition and name varies too wildy and I
have no current code using it to test permutations with.

Moved LOG_NFACILITIES down, as Mac OS X defines this value
differently.

Added Mac OS X specific LOG_* facilities.

Added FreeBSD / DragonFly BSD specific LOG_* facilities.

Moved LOG_PERROR down, as all platforms bar Solaris define this.

Moved LOG_CRON down, as Solaris defines this with a different value.

Moved LOG_AUTHPRIV and LOG_FTP down, as all platforms bar Solaris
define these.

Looks like Solaris is suffering from the bit rot of commercial Unix...