Support: Add links to Matrix and Libera

* Consolidate Forums and Freenode into a new Archives section.

* Remove "Commercial support" section, SitePen no longer offers
  commerical support (confirmed, CC-ed jQuery Team email).

Closes gh-204

page/support.html

@@ -2,49 +2,41 @@
 	"title": "Support Center"
 }</script>
 
-<p>The jQuery UI community is very active and provides a friendly, helpful
-environment when you need development advice or have ideas on how to improve a
-script, stylesheet, documentation, or any other part of the project. The jQuery
-UI team encourages everyone to actively participate in the development of
-the library.</p>
+<p>The jQuery community is provides a friendly, helpful environment to ask for
+development advice.</p>
 
 <h2>Community Support</h2>
 
-Browse the <a href="/demos/">demos</a> to get a glimpse of what functionality
+<p>Browse the <a href="/demos/">demos</a> to get a glimpse of what functionality
 each plugin provides, or read the
-<a href="http://api.jqueryui.com/">API documentation</a> for all methods,
-effects, widgets, and selectors provided by jQuery UI. For more help and support,
-try these resources:</p>
+<a href="https://api.jqueryui.com/">API documentation</a> for all methods,
+effects, widgets, and selectors provided by jQuery UI.</p>
 
-<h3>Forums</h3>
+<h3>Matrix chat</h3>
 
-<p><a href="https://forum.jquery.com/using-jquery-ui">Using jQuery UI</a>:
-For everyone using jQuery UI, and the best place to ask questions and advice
-regarding the use of all UI components, including Themeroller.</p>
+<p>jQuery is on Matrix! The support channel for jQuery is <a href="https://app.element.io/#/room/#jquery_meeting:gitter.im">#jquery_meeting:gitter.im</a>.
+You can read along without an account, or <a href="https://matrix.to/#/#jquery_meeting:gitter.im">join the channel</a> via any Element or Matrix client.</p>
 
-<p><a href="https://forum.jquery.com/developing-jquery-ui">Developing jQuery UI</a>:
-For developers working on building out the jQuery UI library and web sites.
-(Use the Using jQuery UI forum above to discuss how to use jQuery UI.)</p>
+<p>We use the public <a href="https://app.element.io/#/room/#jquery_dev:gitter.im">#jquery_dev:gitter.im</a> channel to discuss project developments,
+and also hold <a href="https://meetings.jquery.org/">weekly meetings</a>.</p>
 
-<p><a href="https://groups.google.com/group/jquery-a11y">jQuery Accessibility</a>:
-For anyone that is unable to use the normal forums due to accessibility issues.</p>
+<h3>IRC chat</h3>
 
-<h3>IRC Chat</h3>
-
-<p>The official IRC support channel is #jquery on irc.freenode.net. For discussions
-about development of jQuery UI, join the #jqueryui-dev channel.
-See <a href="https://irc.jquery.org/">irc.jquery.org</a> for more information.</p>
+<p>There IRC channel for all jQuery projects is <code>#jquery</code> on <a href="https://libera.chat/">Libera Chat IRC</a> (<a href="https://web.libera.chat/#jquery">Join via webchat</a>).</p>
 
 <h2>Found a bug? Let us know!</h2>
 
 <p>Please report any issues and enhancements in
 <a href="https://github.com/jquery/jquery-ui/issues/new">our bug tracking system</a>.</p>
 
-<h2>Commercial support</h2>
-
-<p>The following jQuery Foundation member companies are trusted by the jQuery UI
-project to provide commercial support.</p>
-
-<h3>SitePen</h3>
-<p>When you get commercial support from <a href="https://sitepen.com">SitePen</a>, you’re choosing to work with one of the most experienced Web application development groups in the world. SitePen has been providing quality Web development, analysis, training, and support services since 2000 to companies and individuals around the globe. Our exclusive team of master JavaScript engineers includes current and former contributors to TC39 (EcmaScript), jQuery, the Dojo Toolkit, Node.js, AngularJS, Intern, and more. From start-ups to Fortune 500s, we have the knowledge and expertise to solve problems of any size and keep your project on track and running smoothly. Get in touch today to learn how we can help you achieve your goals.</p>
-<p>Contact: <a href="https://sitepen.com/contact">sitepen.com/contact</a> or <a href="tel:6509688787">650-968-8787</a></p>
+<h2>Archives</h2>
+
+<ul>
+<li><a href="https://irc.jquery.org/">Chat: Freenode IRC</a> (2011-2021): The official support channel was <code>#jquery</code>,
+with internal discussions and meetings happening in <code>#jqueryui-dev</code>.</li>
+<li><a href="https://forum.jquery.com/using-jquery-ui">Forum: Using jQuery UI</a> (2010-2021):
+Questions and advice regarding the use of UI components, including Themeroller.</li>
+<li><a href="https://forum.jquery.com/developing-jquery-ui">Forum: Developing jQuery UI</a> (2010-2019):
+For developers working on building the jQuery UI library itself and its website.</li>
+<li><a href="https://groups.google.com/group/jquery-a11y">Mailing list: jQuery Accessibility</a> (2008-2016)</li>
+</ul>