Fix: all servers get listed as possible target for a new website

Author: tbrehm

interface/web/sites/form/web_domain.tform.php

@@ -72,7 +72,7 @@
 			'formtype'	=> 'SELECT',
 			'default'	=> '',
 			'datasource'	=> array ( 	'type'	=> 'SQL',
-										'querystring' => 'SELECT server_id,server_name FROM server WHERE {AUTHSQL} ORDER BY server_name',
+										'querystring' => 'SELECT server_id,server_name FROM server WHERE web_server = 1 AND {AUTHSQL} ORDER BY server_name',
 										'keyfield'=> 'server_id',
 										'valuefield'=> 'server_name'
 									 ),