mod_http_oauth2: Relax payload content type checking in revocation The code expected Content-Type: application/x-www-form-urlencoded HTTPie sent Content-Type: application/x-www-form-urlencoded; charset=utf-8 It did not work

<tr>
  <th>What is {x} {op} {y}?</th><td>
    <input name="captcha_challenge" type="hidden" value="{challenge}">
    <input name="captcha_reply" pattern="[0-9]+" required type="number">
  </td></tr>