Patch #1680961: remove sys.exitfunc and replace it with a private C API. Also, reimplement atexit in C so it can take advantage of this private API.
diff --git a/Misc/NEWS b/Misc/NEWS
index adaf180..002a26c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -28,6 +28,9 @@
 Core and Builtins
 -----------------
 
+- Patch #1680961: sys.exitfunc has been removed and replaced with a private
+  C-level API.
+
 - PEP 3115: new metaclasses: the metaclass is now specified as a
   keyword arg in the class statement, which can now use the full syntax of
   a parameter list. Also, the metaclass can implement a __prepare__ function
@@ -156,6 +159,8 @@
 Library
 -------
 
+- Patch #1680961: atexit has been reimplemented in C.
+
 - Removed all traces of the sets module.
 
 Build