add new rc.common for standardized init scripts, convert existing init scripts

git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4915 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/default/etc/init.d/S60cron

@@ -1,6 +1,12 @@
-#!/bin/sh
+#!/bin/sh /etc/rc.common
 # Copyright (C) 2006 OpenWrt.org
 
-mkdir -p /var/spool/cron
-ln -s /etc/crontabs /var/spool/cron/crontabs
-crond -c /etc/crontabs
+start () {
+	mkdir -p /var/spool/cron
+	ln -s /etc/crontabs /var/spool/cron/crontabs
+	crond -c /etc/crontabs
+}
+
+stop() {
+	killall crond
+}