updated changelog for release

changelog.html

@@ -61,7 +61,10 @@ Upcoming changes</a>
 
 <!-- these changes are controlled by the release process. DO NOT MODIFY -->
 <div id="rc" style="display:none;"><!--=BEGIN=-->
-<h3><a name=v1.519>What's new in 1.519</a> <!--=DATE=--></h3>
+<h3><a name=v1.520>What's new in 1.520</a> <!--=DATE=--></h3>
+<!--=RC-CHANGES=-->
+</div><!--=END=-->
+<h3><a name=v1.519>What's new in 1.519</a> (2013/06/17)</h3>
 <ul class=image>
   <li class='major bug'>
     Log cluttered with irrelevant warnings about build timestamps when running on Windows on Java 6.
@@ -83,7 +86,6 @@ Upcoming changes</a>
     Remoting classloader performance improvement upon reconnection to the same slave.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-15120">issue 15120</a>)
 </ul>
-</div><!--=END=-->
 <h3><a name=v1.518>What's new in 1.518</a> (2013/06/11)</h3>
 <ul class=image>
   <li class=bug>