Enable IPv6 in XFree86 4.4.0 reachover build. Usage is describe

in "/usr/X11R6/lib/X11/doc/RELNOTES". Note particularly that "tcp",
as in "X -nolisten tcp" or "xhost +tcp/host:0", now means *both*
IP transport protocols. Use "inet" or "inet6", instead, to specify
only one or the other.

XDMCP support for IPv6 -- such as it is -- is disabled, just as
it is in the native, out-of-the-box build. XDM-AUTHORIZATION-1
does not really support IPv6 addresses, in any case. (It is
possible to build "xdm" with -DIPv6, but that presumes support
for IPv6-mapped IPv4 addresses in the default installation, for
one thing, and there are unexplored issues with all that.)

share/mk/bsd.x11.mk

@@ -1,4 +1,4 @@
-#	$NetBSD: bsd.x11.mk,v 1.36 2004/03/16 00:24:47 perry Exp $
+#	$NetBSD: bsd.x11.mk,v 1.37 2004/03/26 21:29:54 fredb Exp $
 
 .include <bsd.init.mk>
 
@@ -17,7 +17,8 @@ X11FLAGS.THREADS=	-DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API \
 X11FLAGS.THREADLIB=	${X11FLAGS.THREADS} -DUSE_NBSD_THREADLIB
 
 #	 CONNECTION_FLAGS
-X11FLAGS.CONNECTION=	-DTCPCONN -DUNIXCONN -DHAS_STICKY_DIR_BIT -DHAS_FCHOWN
+X11FLAGS.CONNECTION=	-DTCPCONN -DUNIXCONN -DHAS_STICKY_DIR_BIT \
+			-DHAS_FCHOWN -DIPv6
 
 #	 EXT_DEFINES
 X11FLAGS.EXTENSION=	-DMITMISC -DXTEST -DXTRAP -DXSYNC -DXCMISC -DXRECORD \

x11/bin/xdm/Makefile.xdm

@@ -1,9 +1,9 @@
-#	$NetBSD: Makefile.xdm,v 1.2 2004/01/02 17:19:51 lukem Exp $
+#	$NetBSD: Makefile.xdm,v 1.3 2004/03/26 21:29:54 fredb Exp $
 
 CPPFLAGS+=	-DBINDIR=\"${X11BINDIR}\" -DXDMDIR=\"${X11LIBDIR}/xdm\" \
 		-DHASXDMAUTH ${X11FLAGS.CONNECTION} -DGREET_USER_STATIC \
 		-DFRAGILE_DEV_MEM -DDEV_RANDOM=\"/dev/urandom\" \
-		-DXPM -DUSE_XINERAMA -DHAS_SETPROCTITLE \
+		-DXPM -DUSE_XINERAMA -DHAS_SETPROCTITLE -UIPv6 \
 		-I${X11SRCDIR.xc}/programs/xdm \
 		${X11FLAGS.VERSION}