Remove BUGS notice that ppp(4) only works for IPv4

This time to the right branch... sorry for the mess!

share/man/man4/ppp.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: ppp.4,v 1.11 2004/12/05 13:27:26 wiz Exp $
+.\"	$NetBSD: ppp.4,v 1.12 2005/01/10 18:03:37 hubertf Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     From:	@(#)lo.4	8.1 (Berkeley) 6/5/93
 .\"
-.Dd December 5, 2004
+.Dd January 10, 2005
 .Dt PPP 4
 .Os
 .Sh NAME
@@ -93,7 +93,3 @@ The
 .Nm
 device appeared in
 .Nx 1.0 .
-.Sh BUGS
-Currently, only the
-.Xr ip 4
-protocol is supported.