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=v1.583>What's new in 1.583</a> <!--=DATE=--></h3>
+<h3><a name=v1.584>What's new in 1.584</a> <!--=DATE=--></h3>
+<!--=RC-CHANGES=-->
+</div><!--=END=-->
+<h3><a name=v1.583>What's new in 1.583</a> (2014/10/01)</h3>
 <ul class=image>
   <li class='major bug'>
     Fixes to multiple security vulnerabilities.
     (<a href="https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2014-10-01">security advisory</a>)
 <!--=RC-CHANGES=-->
-</div><!--=END=-->
 <h3><a name=v1.582>What's new in 1.582</a> (2014/09/28)</h3>
 <ul class=image>
   <li class=bug>