updated changelog for release

changelog.html

@@ -61,13 +61,15 @@ Upcoming changes</a>
 
 <!-- these changes are controlled by the release process. DO NOT MODIFY -->
 <div id="rc" style="display:none;"><!--=BEGIN=-->
-<h3><a name=v1.592>What's new in 1.592</a> <!--=DATE=--></h3>
+<h3><a name=v1.593>What's new in 1.593</a> <!--=DATE=--></h3>
+<!--=RC-CHANGES=-->
+</div><!--=END=-->
+<h3><a name=v1.592>What's new in 1.592</a> (2014/11/30)</h3>
 <ul class=image>
   <li class=bug>
     Performance problems on large workspaces associated with validating file include patterns.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-25759">issue 25759</a>)
 </ul>
-</div><!--=END=-->
 <h3><a name=v1.591>What's new in 1.591</a> (2014/11/25)</h3>
 <ul class=image>
   <li class=>