new dns helper class

core/Helper/DnsHelper.php

@@ -1,7 +1,7 @@
 <?php
 
 namespace ThurData\Servers\KerioEmail\Core\Helper;
-require_once '/usr/share/php/Net/DNS2/Resolver.php';
+require_once '/usr/share/php/Net/DNS2.php';
 use \Net\DNS2\Net_DNS2_Resolver as Net_DNS2_Resolver;
 
 /**