update URL for pool servers

From: Pierre Riteau <pierre.riteau@free.fr>

src/etc/ntpd.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: ntpd.conf,v 1.7 2004/07/20 17:38:35 henning Exp $
+# $OpenBSD: ntpd.conf,v 1.8 2007/07/13 09:05:52 henning Exp $
 # sample ntpd configuration file, see ntpd.conf(5)
 
 # Addresses to listen on (ntpd does not listen by default)
@@ -8,5 +8,5 @@
 #server ntp.example.org
 
 # use a random selection of 8 public stratum 2 servers
-# see http://twiki.ntp.org/bin/view/Servers/NTPPoolServers
+# see http://support.ntp.org/bin/view/Servers/NTPPoolServers
 servers pool.ntp.org