add support for if{down,up} -a and implement proper start/stop/restart for /etc/init.d/network

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6455 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/sbin/ifdown

@@ -1,8 +1,15 @@
 #!/bin/sh
 # Copyright (C) 2006 OpenWrt.org
 
-[ $# = 0 ] && { echo "  $0 <group>"; exit; }
 . /etc/functions.sh
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
+[ "x$1" = "x-a" ] && {
+	config_cb() {
+		[ -z "$2" ] || eval "$0 $2"
+	}
+	config_load network
+	exit
+}
 include /lib/network
 scan_interfaces