mod_muc_cloud_notify: Count codepoints instead of bytes Still marked as a 'TODO' in XEP-0372, but Converse.js is counting codepoints, and rough consensus is that this is the easiest approach in the widest range of environments.

<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>