Applied patch from Frederic Boiteux <fboiteux@calistel.com> about NFS…

…ROOT=auto, <http://lists.alioth.debian.org/pipermail/debian-live-devel/2007-September/002173.html>.

scripts/live

@@ -585,17 +585,17 @@ do_netmount ()
 
 	ipconfig ${DEVICE} | tee /netboot.config
 
-	if [ "${NFSROOT}" = "auto" ]
-	then
-		NFSROOT=${ROOTSERVER}:${ROOTPATH}
-	fi
-
 	# source relevant ipconfig output
 	OLDHOSTNAME=$HOSTNAME
 	. /tmp/net-${DEVICE}.conf
 	[ -z $HOSTNAME ] && HOSTNAME=$OLDHOSTNAME
 	export HOSTNAME
 
+	if [ "${NFSROOT}" = "auto" ]
+	then
+		NFSROOT=${ROOTSERVER}:${ROOTPATH}
+	fi
+
 	if [ -n "${FETCH}" ] && do_httpmount
 	then
 		rc=0