bpo-31558: Update NEWS and ACKS (#4013)

ambv · web-flow · commit c30b55b96c09 · 2017-10-16T14:39:08.000-07:00
diff --git a/Misc/ACKS b/Misc/ACKS
@@ -919,6 +919,7 @@ William Lewis
 Akira Li
 Robert Li
 Xuanji Li
+Zekun Li
 Robert van Liere
 Ross Light
 Shawn Ligocki
diff --git a/Misc/NEWS.d/next/Core and Builtins/2017-10-16-14-27-25.bpo-31558.K-uRRm.rst b/Misc/NEWS.d/next/Core and Builtins/2017-10-16-14-27-25.bpo-31558.K-uRRm.rst
@@ -0,0 +1,5 @@
+``gc.freeze()`` is a new API that allows for moving all objects currently
+tracked by the garbage collector to a permanent generation, effectively
+removing them from future collection events. This can be used to protect
+those objects from having their PyGC_Head mutated. In effect, this enables
+great copy-on-write stability at fork().
