Use matrix for webchat links

Instead of directing users to the anonymous oftc webchat page,
direct them to the matrix portal room.  Unlike the webchat, they
will need to sign up for an account, however, they will obtain
access to channel history, and might even stick around or come
back.

Change-Id: I748239b6c03148229b76c0aab9583bd54988954f

www/community.html

@@ -70,8 +70,8 @@
 		<p>Join the <em>zuul-discuss</em> list to ask questions about using Zuul or contributing to its development.  All potential and existing developers, users, and operators of Zuul are welcome.</p>
 
                 <h3>Chat on IRC</h3>
-                <a href="https://webchat.oftc.net/?channels=%23zuul" class="image right"><img src="images/irc.png" alt="" /></a>
+                <a href="https://matrix.to/#/#_oftc_#zuul:matrix.org" class="image right"><img src="images/irc.png" alt="" /></a>
-                <p>Join <a href="https://webchat.oftc.net/?channels=%23zuul">#zuul</a> on OFTC</p>
+                <p>Join <a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">#zuul</a> on OFTC</p>
 		<p>Developers and users are in the <em>#zuul</em> channel on OFTC 24 hours a day.  But sometimes we leave our desks, so if you ask a question there, be patient.</p>
 
                 <h3>Report Bugs</h3>
@@ -164,7 +164,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>

www/docs/faq.html

@@ -159,7 +159,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>

www/docs/index.html

@@ -146,7 +146,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>

www/get-started.html

@@ -113,7 +113,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>

www/index.html

@@ -210,10 +210,10 @@
               </section>
               <section class="6u 12u(narrower)">
                 <div class="box post">
-                  <a href="https://webchat.oftc.net/?channels=%23zuul" class="image left"><img src="images/irc.png" alt="" /></a>
+                  <a href="https://matrix.to/#/#_oftc_#zuul:matrix.org" class="image left"><img src="images/irc.png" alt="" /></a>
                   <div class="inner">
                     <h3>Chat on IRC</h3>
-                    <p>Join <a href="https://webchat.oftc.net/?channels=%23zuul">#zuul</a> on OFTC.</p>
+                    <p>Join <a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">#zuul</a> on OFTC.</p>
                   </div>
                 </div>
               </section>
@@ -238,7 +238,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>

www/users.html

@@ -357,7 +357,7 @@
                 <h3>Get Involved</h3>
                 <ul class="links">
                   <li><a href="http://lists.zuul-ci.org/cgi-bin/mailman/listinfo">Mailing lists</a></li>
-                  <li><a href="https://webchat.oftc.net/?channels=%23zuul">IRC</a> #zuul on OFTC</li>
+                  <li><a href="https://matrix.to/#/#_oftc_#zuul:matrix.org">IRC</a> #zuul on OFTC</li>
                   <li><a href="https://storyboard.openstack.org/#!/project/679">Bugs</a></li>
                   <li><a href="https://review.opendev.org/#/q/status:open+project:zuul/zuul">Code Review</a></li>
                 </ul>