add custom online/offline hook cmd

Author: hanwckf

openwrt/files/scutclient.config

@@ -11,4 +11,5 @@ config drcom
 	option version '4472434f4d0096022a'
 	option hash '2ec15ad258aee9604b18f2f8114da38db16efd00'
 	option dns '222.201.130.30'
-	option onlinehook '/etc/init.d/sysntpd restart'
+	option onlinehook 'echo 0 > /tmp/scutclient_status'
+	option offlinehook 'echo 1 > /tmp/scutclient_status'