update features, allow sys account page deletion

include/items.php

@@ -3994,6 +3994,11 @@ function drop_item($id,$interactive = true,$stage = DROPITEM_NORMAL,$force = fal
 	if(local_channel() && local_channel() == $item['uid'])
 		$ok_to_delete = true;
 
+	// sys owned item, requires site admin to delete
+	$sys = get_sys_channel();
+	if(is_site_admin() && $sys['channel_id'] == $item['uid'])
+		$ok_to_delete = true;
+
 	// author deletion
 	$observer = $a->get_observer();
 	if($observer && $observer['xchan_hash'] && ($observer['xchan_hash'] === $item['author_xchan']))