FPM: Consider escaping script in status

Description

Currently the script field in status is not escaped for neither JSON, HTML nor XML. It should be investigated if any of the characters requiring escape can get to the script filename. This is very unlikely issue in practice but potentially theoretical possible so it might be a good idea to address it.

The thing to try would be to have a script whose path needs to be escaped. The server might be able to access with URL escape that is eventually transformed to the path with a character requiring an escape. This needs some testing if it's even possible.

PHP Version

Any with FPM

Operating System

Linux

まず、エスケープが必要な文字をパスに含むスクリプトを使って PHP-FPM のステータス出力をテストし、JSON、HTML、XML を対象にします。URL エスケープによってそのようなパスを生成できるか、また script フィールドが安全に出力されるかを確認します。完了とは、動作が確認され、必要なエスケープに対処されていることを意味します。