Fix BUG: redirect rule not set after restart

package/openwrt/files/etc/init.d/smartdns

@@ -1,7 +1,7 @@
 #!/bin/sh /etc/rc.common
 # Copyright (C) 2018 Nick Peng (pymumu@gmail.com)
 
-START=90
+START=99
 SERVICE_USE_PID=1
 SERVICE_WRITE_PID=1
 SERVICE_DAEMONIZE=1
@@ -30,6 +30,11 @@ clear_iptable()
 	
 }
 
+service_triggers() {
+    procd_add_reload_trigger firewall
+}
+
+
 conf_append()
 {
 	echo "$1 $2" >> $SMARTDNS_CONF_TMP