Noting https://github.com/jenkinsci/jenkins/pull/1268 , cleanup of previous changelogs

Signed-off-by: NOleg Nenashev <o.v.nenashev@gmail.com>

changelog.html

@@ -62,17 +62,20 @@ Upcoming changes</a>
     Some plugins broken since 1.584 if they expected certain events to be fired under a specific user ID.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-25400">issue 25400</a>)
   <li class=bug>
-    Fixed various real or potential resource leaks.
+    Fixed various real or potential resource leaks discovered by <a href="https://scan.coverity.com/projects/94/">Coverity Scan</code>
     (<a href="https://github.com/jenkinsci/jenkins/pull/1434">pull request 1434</a>)  
-  <li class=fre>
-    Expose AbstractProject.AbstractProjectDescriptor#validateLabelExpression for plugins.
+  <li class=rfe>
+    API changes: Expose <code>AbstractProject.AbstractProjectDescriptor#validateLabelExpression</code> for plugins.
     (<a href="https://github.com/jenkinsci/jenkins/pull/1456">pull request 1456</a>)
-  <li class=fre>
-    Aggregate multiple FormValidations into one.
+  <li class=rfe>
+    API method to aggregate multiple FormValidations into one.
     (<a href="https://github.com/jenkinsci/jenkins/pull/1458">pull request 1458</a>)
   <li class=bug>
     Always use forward slashes in path separators during in ZIP archives generated by Directory Browser
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22514">issue 22514</a>)  
+  <li class=rfe>
+    API method to get non-null <code>Jenkins</code> instance with internal validation
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-23339">issue 23339</a>)    
 </ul>
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