Updated changelog to indicate regression in agenda tool features - refs #2158

documentation/changelog.html

@@ -204,6 +204,7 @@ This version of Chamilo only includes new features:
     <b>Document title:</b> The option to NOT use a document title different than the filename in the documents tool has been removed. This means that if this setting was not set to the default option in your Chamilo option or if you have a very old installation that you have been upgrading over the years, you might experience problems accessing the documents. In this case, we recommend contacting an official provider of Chamilo to take this migration in charge.
     </li>
     <li>During upgrade, if your database ends with "c_", the installation process will report errors in the PHP error log. This is due to a check on the new c_id field for database normalization, but is not important. The corresponding logging code can be disabled in database.lib.php</li>
+	<li>Agenda regression: because we implemented a much more usable and familiar agenda for most of you, and because we lacked some time to go into the details, we have temporarily removed the possibility to make an event visible to specific users (they are always visible to all the course users right now) - see task #5201 for details</li>
 </ul>
 
 <h3>Third-Party Libraries additions/updates</h3>