title: .htaccess: auto_append_file only working for PHP files, not for HTML files
body: <p>I'm using the following code in my .htaccess file: <code>php_value auto_append_file included_file.html</code></p>
  <p>This is working as expected if I call <code>https://www.example.com/file.php</code> but it's not working if I call <code>https://www.example.com/file.html</code>.</p>
  <p>It seems like <code>auto_append_file</code> is only working for <code>PHP</code> files and not for <code>HTML</code> files.</p>
  <p>Is this an expected behavior or is there a way to fix this?</p>