   </li>
                </ul>
            </li>
        </ul>

<h4><a id="upgrade_4_0_0" href="#upgrade_4_0_0">Upgrading to 4.0.0</a></h4>

<h5><a id="upgrade_clients_4_0_0" href="#upgrade_clients_4_0_0">Upgrading Clients to 4.0.0</a></h5>

<p><b>For a rolling upgrade:</b></p>

<ol>
    <li>Upgrade the clients one at a time: shut down the client, update the code, and restart it.</li>
    <li>Clients (including Streams and Connect) must be on version 2.1 or higher before upgrading to 4.0. Many deprecated AP