title: twisted connectTCP with IPv6
body: <p>How can I access an IPv6 address with twisted and listenTCP? If I take the address from ifconfig, with e.g. aaa::bbbb:cccc:dddd:eeee then I get the following error message:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>raise CannotListenError(self.interface, self.port, le)
  twisted.internet.error.CannotListenError: Couldn't listen on aaa::bbbb:cccc:dddd:eeee</code></pre>
  </div>
  </div>
  </p>