allow empty hostname field for several dns record types.

tbrehm

2009-01-19 b38ec6dd99892325beabd65c089847035edef3d7

 interface/lib/classes/listform_actions.inc.php

@@ -132,7 +132,7 @@
   }
   
   
   private function onShow()
   public function onShow()
    {
      global $app;