[JENKINS-21639] Noting merge of #1117.

changelog.html

@@ -73,6 +73,9 @@ Upcoming changes</a>
   <li class=bug>
     Fixed missing help items on "Configure Global Security" page
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-19832">issue 19832</a>)
+  <li class=bug>
+    Should not be able to create a job named <code>.</code> (period).
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-21639">issue 21639</a>)
   <li class=rfe>
     Plugins implementing "AsyncPeriodicWork" can overwrite default logging level
     (<a href="https://github.com/jenkinsci/jenkins/pull/1115">pull request #1115</a>)