Merge pull request #1387 from spinza/addntpservice

Add ntp service monitoring.

doc/Extensions/Services.md

@@ -48,3 +48,4 @@ no graphs will be generated. **
 - smtp
 - pop
 - simap
+- ntp

includes/services/ntp/check.inc

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