Fixes #4085 - firewall record list on mirrored dns server (cosmetic?)

Author: Florian Schaal

interface/web/admin/list/firewall.list.php

@@ -63,7 +63,7 @@
 	'prefix' => "%",
 	'suffix' => "%",
 	'datasource' => array (  'type' => 'SQL',
-		'querystring' => 'SELECT server_id,server_name FROM server WHERE {AUTHSQL} AND mirror_server_id = 0 ORDER BY server_name',
+		'querystring' => 'SELECT server_id,server_name FROM server WHERE {AUTHSQL} ORDER BY server_name',
 		'keyfield'=> 'server_id',
 		'valuefield'=> 'server_name'
 	),