mod_http_xep227: Don't require admin privileges to use import/export These APIs always operate on the current user account only. In the future we may want to have a more specific permission check though.

<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>