mod_http_oauth2: Reuse JWT issuance time as substitute for auth time Makes the token shorter. Since iat and auth_time are generated at about the same time they would only differ by a few microseconds anyway.

<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>