Merge branch 'master' of https://github.com/arnoldthebat/librenms into issue-1390

Added load and state icons from silk icons

doc/Extensions/Services.md

@@ -49,3 +49,4 @@ no graphs will be generated. **
 - pop
 - simap
 - ntp
+- ircd

includes/services/ircd/check.inc

@@ -0,0 +1,13 @@
+<?php
+
+$check = shell_exec($config['nagios_plugins'] . "/check_ircd -H ".$service['hostname']." ".$service['service_param']);
+
+list($check, $time) = split("\|", $check);
+
+if (strstr($check, "IRCD ok")) {
+    $status = '1';
+} else {
+    $status = '0';
+}
+
+?>