Fixed not used and prepared config variable $misc_config['dashboard_atom_url']...

Fixed not used and prepared config variable $misc_config['dashboard_atom_url'] in dashboard news feed.

interface/web/dashboard/lib/custom_menu.inc.php

@@ -40,7 +40,7 @@ if($misc_config['dashboard_atom_url'] != '') {
 
 	if(!isset($_SESSION['s']['rss_news'])) {
 		
-		$app->simplepie->set_feed_url('http://www.ispconfig.org/atom');
+		$app->simplepie->set_feed_url($misc_config['dashboard_atom_url']);
 		$app->simplepie->enable_cache(false);
 		$app->simplepie->init();
 		$items = $app->simplepie->get_items();
@@ -73,4 +73,4 @@ if($misc_config['dashboard_atom_url'] != '') {
 
 $app->tpl->setLoop('news',$rows);
 
-?>
\ No newline at end of file
+?>