hixie: Include example of meta refresh with URL. (whatwg r4365)

hixie: Include example of meta refresh with URL. (whatwg r4365)

http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.3497&r2=1.3498&f=h
http://html5.org/tools/web-apps-tracker?from=4364&to=4365

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RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.3497
retrieving revision 1.3498
diff -u -d -r1.3497 -r1.3498
--- Overview.html	27 Oct 2009 19:47:01 -0000	1.3497
+++ Overview.html	27 Oct 2009 19:50:11 -0000	1.3498
@@ -10311,6 +10311,16 @@
 
     </div>
 
+    <div class="example">
+
+     <p>A sequence of pages could be used as an automated slide show
+     by making each page refresh to the next page in the sequence,
+     using markup such as the following:</p>
+
+     <pre>&lt;meta http-equiv="Refresh" content="20; URL=page4.html"&gt;</pre>
+
+    </div>
+
    </dd>
 
   </dl><p>There must not be more than one <code><a href="#meta">meta</a></code> element with