Add PF_BLUETOOTH to list of supported protocol families

lib/libc/sys/socket.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: socket.2,v 1.33 2006/06/13 21:19:56 ginsbach Exp $
+.\"	$NetBSD: socket.2,v 1.34 2007/02/20 19:08:59 plunky Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -62,6 +62,7 @@ PF_ISO		ISO protocols
 PF_NS		Xerox Network Systems protocols
 PF_IMPLINK	IMP \*(lqhost at IMP\*(rq link layer
 PF_APPLETALK	AppleTalk protocols
+PF_BLUETOOTH	Bluetooth protocols
 .Ed
 .Pp
 The socket has the indicated