Add #minetest-hub to the list of official channels

irc.html

@@ -23,6 +23,12 @@ redirect_from:
       (<a href="http://irc.minetest.net/minetest-dev">logs</a>):
       development channel, only serious stuff; note that webchat is muted due to too much spam/flood.
     </li>
+    <li>
+      <strong>#minetest-hub</strong>
+      (<a href="http://irc.minetest.net/minetest-hub">logs</a>):
+      A moderated channel for people who regularly improve Minetest by developing, modding, hosting servers and otherwise.
+      See <a href="http://hub.minetest.net/info">the channel's website</a> for more information.
+    </li>
   </ul>
 </div>