added language vars for hardcoded <legend> headlines

cfoe

2012-07-05 4a47667d9b6d56507c649bb6f98a9161ebce8df5

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

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

$wb['zone_file_import_txt'] = 'Zone File Import';
$wb['server_id_txt'] = 'Server';
$wb['client_txt'] = 'Client';
$wb["btn_save_txt"] = 'Import Zonefile';