Discuz X3.2 facebook 連結至 discuz 的錯誤修正

discuz_application.php

private function _xss_check() {
                $_SERVER['REQUEST_URI'] = preg_replace("/(&|\?)fb_action(.*?)$/i", "", $_SERVER['REQUEST_URI']);
                $temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
                if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
                        system_error('request_tainting');
                }
                return true;
        }