IRC launch updates

* New rules
* Private header now links straight to the wiki page

design/privateheader.php

@@ -174,7 +174,7 @@ if ($NotificationsManager->is_skipped(NotificationsManager::SUBSCRIPTIONS)) {
           </li>
           <li id="nav_irc"<?=
             Format::add_class($PageID, ['chat'], 'active', true)?>>
-            <a href="chat.php">IRC / Discord</a>
+            <a href="/wiki.php?action=article&name=Chat">IRC / Discord</a>
           </li>
           <li id="nav_top10"<?=
             Format::add_class($PageID, ['top10'], 'active', true)?>>