gluon-wan-dnsmasq: run as dnsmasq user/group

package/gluon-wan-dnsmasq/files/etc/init.d/gluon-wan-dnsmasq

@@ -13,7 +13,8 @@ start_service() {
 
 	procd_open_instance
 	procd_set_param command /usr/sbin/dnsmasq \
-		--user=root \
+		--user=dnsmasq \
+		--group=dnsmasq \
 		--interface=lo \
 		--port=54 \
 		--no-hosts \