fix luci-app-udp2raw

third-party/luci-app-udp2raw/files/root/etc/init.d/udp2raw

@@ -41,6 +41,8 @@ create_config() {
 
 	[ -n "$log_level" ] && echo "--log-level ${log_level}" >> $config_file
 	echo "--disable-color" >> $config_file
+
+	echo "--wait-lock" >> $config_file
 }
 
 validate_config_section() {