Registering plugin

protected function _initPlugins()
    {
        $this->bootstrap('FrontController');
        $front = $this->getResource('FrontController');

        $auth = Zend_Auth::getInstance();
        $acl = new Fresh_Acl_Acl($auth);

        $front->setParam('auth', $auth);
        $front->setParam('acl', $acl);
        $front->registerPlugin(new Fresh_Controller_Plugin_Auth($auth, $acl));

        return $front;
    }