Do not suppress routes if the router received on renew is the same (#138)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7215 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/usr/share/udhcpc/default.script

@@ -28,7 +28,7 @@ case "$1" in
 		netmask ${subnet:-255.255.255.0} \
 		broadcast ${broadcast:-+}
 
-		if [ -n "$router" ] ; then
+		if [ "$router" != "$(route -n | grep '^0.0.0.0' | grep $interface | awk '{ print $2 }')" ] ; then
 			echo "deleting routers"
 			while route del default gw 0.0.0.0 dev $interface >&- 2>&- ; do :; done