base-files: revert dhcp state information on ifdown and restore pre-r19530 behaviour in udhcp default.script

SVN-Revision: 19597

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

@@ -31,8 +31,7 @@ setup_interface () {
 		config_get old_subnet    "$ifc" netmask
 	}
 
-	[ "$1" = "ifup" ] \
-	|| [ "$ip" != "$old_ip" ] \
+	[ "$ip" != "$old_ip" ] \
 	|| [ "${broadcast:-+}" != "$old_broadcast" ] \
 	|| [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
 		echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"