o sync with x11/XFree86-4

- startx -nolisten tcp by default.
 - set login.conf environment for xdm.

x11/XFree86-4-clients/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	clients
 PORTVERSION=	4.1.0
+PORTREVISION=	1
 CATEGORIES=	x11
 MASTER_SITES=	${MASTER_SITE_XFREE}
 MASTER_SITE_SUBDIR=	4.1.0

x11/XFree86-4-libraries/files/patch-xdm_session.c

@@ -0,0 +1,27 @@
+--- programs/xdm/session.c.orig	Wed May 30 00:56:22 2001
++++ programs/xdm/session.c	Fri Sep 28 23:25:16 2001
+@@ -541,6 +541,7 @@
+     int	pid;
+ #ifdef HAS_SETUSERCONTEXT
+     struct passwd* pwd;
++    extern char **environ;
+ #endif
+ #ifdef USE_PAM 
+     pam_handle_t *pamh = thepamh();
+@@ -623,6 +624,8 @@
+ 	 * Set the user's credentials: uid, gid, groups,
+ 	 * environment variables, resource limits, and umask.
+ 	 */
++        /* destroy user environment before calling setusercontext */
++	environ = verify->userEnviron;
+ 	pwd = getpwnam(name);
+ 	if (pwd)
+ 	{
+@@ -632,6 +635,7 @@
+ 		    errno);
+ 		return (0);
+ 	    }
++            verify->userEnviron = environ;    
+ 	    endpwent();
+ 	}
+ 	else