added language vars for hardcoded <legend> headlines

cfoe

2012-07-05 4a47667d9b6d56507c649bb6f98a9161ebce8df5

 interface/web/dns/lib/lang/en_dns_wizard.lng

@@ -1,5 +1,5 @@
<?php

$wb['dns_zone_txt'] = 'DNS Zone';
$wb['template_id_txt'] = 'Template';
$wb['server_id_txt'] = 'Server';
$wb['client_txt'] = 'Client';