netifd: do not stop service on shutdown, only call ifdown

Also add a small delay, like on restart

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 44096

package/network/config/netifd/files/etc/init.d/network

@@ -148,5 +148,5 @@ restart() {
 
 shutdown() {
 	ifdown -a
-	stop
+	sleep 1
 }