wmstartup: Add xrdbupdate startup task

.config/dtfscripts/services/0_xrdbupdate.dtf

@@ -0,0 +1,22 @@
+#! /usr/bin/env bash
+#
+# Simple wmstartup service
+# Copyright (C) 2018 salt <salt@lap-th-e560-0>
+#
+# Distributed under terms of the MIT license.
+#
+
+service_name="Xresources"
+service_process="xrdbupdate"
+service_kill_on_reload="false"
+
+function start() {
+	svc_log "Updating"
+	$service_process $service_flags > /dev/null 2>&1 &
+	return 0
+}
+
+function stop() {
+	return 1
+}
+