Expose Py_Py3kWarningFlag as sys.py3kwarning as discussed in #1504
Also added a warning.warnpy3k() as convenient method for Python 3.x related deprecation warnings.
diff --git a/Misc/NEWS b/Misc/NEWS
index d0df601..6af34e1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
Core and builtins
-----------------
+- Expose the Py_Py3kWarningFlag as sys.py3kwarning.
+
- Issue #1445: Fix a SystemError when accessing the ``cell_contents``
attribute of an empty cell object.
@@ -837,6 +839,8 @@
Extension Modules
-----------------
+- Added warnpy3k function to the warnings module.
+
- Marshal.dumps() now expects exact type matches for int, long, float, complex,
tuple, list, dict, set, and frozenset. Formerly, it would silently miscode
subclasses of those types. Now, it raises a ValueError instead.