offline_hints: discard no-store hinted messages at mod_offline This module will hook `message/offline/handle` and will skip offline storage for messages hinted with `no-store` or `no-permanent-store`.

<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>