Fix for: http://bugtracker.ispconfig.org/index.php?do=details&task_id=1671

Added destructor and session write to app class instead.

interface/lib/app.inc.php

@@ -75,6 +75,11 @@ class app {
 
 		$this->uses('auth,plugin,functions');
 	}
+	
+	public function __destruct() {
+		session_write_close();
+		if(isset($this->db)) $this->db->closeConn();
+	}
 
 	public function uses($classes) {
 		$cl = explode(',', $classes);

interface/lib/classes/db_mysql.inc.php

@@ -54,10 +54,6 @@ class db {
 		//$this->connect();
 	}
 
-	public function __destruct() {
-		$this->closeConn();
-	}
-
 	/**  Error handler */
 	public function updateError($location)
     {

interface/web/login/logout.php

@@ -64,6 +64,7 @@ $app->plugin->raiseEvent('logout',true);
 $_SESSION["s"]["user"] = null;
 $_SESSION["s"]["module"] = null;
 $_SESSION['s_old'] = null;
+session_write_close();
 
 //header("Location: ../index.php?phpsessid=".$_SESSION["s"]["id"]);