Noting merge of #1187.

changelog.html

@@ -58,6 +58,8 @@ Upcoming changes</a>
   <li class=bug>
     More efficient deletion of old builds (specified by date).
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22607">issue 22607</a>)
+  <li class=rfe>
+    The matrix project type was moved into its own plugin.
   <li class=bug>
     Linkage errors in notifiers could leak workspace leases.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-21622">issue 21622</a>)