#10968: commit threading doc changes and corresponding whatsnew entry.

It is unfortunate that the '_' names were not kept as aliases, and that RLock
was not also converted to a class, but it is now too late to change either of
those things for 3.3.
diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst
index 088ea4a..1fef8d3 100644
--- a/Doc/whatsnew/3.3.rst
+++ b/Doc/whatsnew/3.3.rst
@@ -1945,6 +1945,12 @@
 threading
 ---------
 
+:class:`threading.Condition`, :class:`threading.Semaphore`,
+:class:`threading.BoundedSempaphore`, :class:`threading.Event`, and
+:class:`threading.Timer`, all of which used to be factory functions returning a
+class instance, are now classes and may be subclassed. (Contributed by Éric
+Araujo in :issue:`109681`).
+
 The :class:`threading.Thread` constructor now accepts a ``daemon`` keyword
 argument to override the default behavior of inheriting the ``deamon`` flag
 value from the parent thread (:issue:`6064`).
@@ -2331,6 +2337,10 @@
   make decisions affected by the AST version, use :attr:`sys.version_info`
   to make the decision.
 
+* Code that used to work around the fact that the :mod:`threading` module used
+  factory functions by subclassing the private classes will need to change to
+  subclass the now-public classes.
+
 
 Porting C code
 --------------