add security mailing list

docs/site/index.html

@@ -123,9 +123,9 @@ <h1>Deployment</h1>
           href="http://docs.gunicorn.org/en/latest/deploy.html">docs.gunicorn.org</a></p>
       </div>
       <div class="tab-box" data-tab="community">
-        <h1>Mailing list</h1>
+        <h1>Mailing lists</h1>
         <p>The user mailing list is general discussion and support list for
-          Gunicorn users.</p>
+          Gunicorn users and developers.</p>
           <ul>
             <li>
               To subscribe, send an email to <a href="mailto:user+subscribe&#64;gunicorn.org">user+subscribe&#64;gunicorn.org</a>
@@ -139,14 +139,19 @@ <h1>Mailing list</h1>
             </li>
           </ul>
         <p>The archive for this list can also be <a href="http://lists.gunicorn.org/user">browsed online</a>.</p>
-
         <h1>Irc</h1>
         <p>The Gunicorn channel is on the <a href="http://freenode.net/">Freenode</a> IRC
           network. You can chat with other on <a href="http://webchat.freenode.net/?channels=gunicorn">#gunicorn channel</a>.</p>
 
         <h1>Issue Tracking</h1>
         <p>Bug reports, enhancement requests and tasks generally go in the <a  href="http://github.com/benoitc/gunicorn/issues">Github
           issue tracker</a>.</p>
+
+        <h1>Security Mailing list</h1>
+        <p>The security mailing list is a place to report issues. Only
+        developers are subscribed to it. To post a message to the list use the
+        address to  <a  href="mailto:security&#64;gunicorn.org">security&#64;gunicorn.org</a></p>
+
       </div>
       <div class="tab-box" data-tab="docs">
         <h1>Documentation</h1>