timeout.">A HTTP HEAD async request with a timeout.</a></h4>.</td></tr>
<tr><td valign="top"><a href="#options-4">options/4</a></td><td>
  <h4><a name="A_HTTP_OPTIONS_request.">A HTTP OPTIONS request.</a></h4>.</td></tr>
<tr><td valign="top"><a href="#options-5">options/5</a></td><td>
  <h4><a name="A_HTTP_OPTIONS_request_with_a_timeout.">A HTTP OPTIONS request with a timeout.</a></h4>.</td></tr>
<tr><td valign="top"><a href="#options_async-4">options_async/4</a></td><td>
  <h4><a name="A_HTTP_OPTIONS_async