[changelog] Add 'multiple message with the same old name'

Author: Pierre-Sassoulas

CONTRIBUTORS.txt

@@ -288,6 +288,8 @@ contributors:
 
 * Pierre Sassoulas : contributor
     - Made C0412 (ungrouped import) compatible with isort
+    - Made multiple message with the same old name possible
+    - Made Pylint a little faster by refactoring the message store
 
 * Nathan Marrow
 

ChangeLog

@@ -254,7 +254,7 @@ Release date: TBA
 * Allow a `.` as a prefix for Sphinx name resolution.
 
 * Checkers must now keep a 1 to 1 relationship between "msgid" (ie: C1234) and "symbol" (ie : human-readable-symbol)
-* In checkers, an old_names can now be used for multiple new messages
+* In checkers, an old_names can now be used for multiple new messages and pylint is now a little faster
 
 Caused by #1164. It means if you do a partial old_names for a message definition an exception will tell you that you
 must rename the associated identification.