whatsnew: Windows uses VirtualAlloc, --version goes to stdout.

Doc/whatsnew/3.4.rst

@@ -1422,6 +1422,7 @@ Other Build and C API Changes
   (Contributed by Ysj Ray and Victor Stinner in :issue:`7330`.)
 
 
+.. _other-improvements-3.4:
 
 Other Improvements
 ------------------
@@ -1510,6 +1511,10 @@ Significant Optimizations
 * :func:`html.escape` is now 10x faster.  (Contributed by Matt Bryant in
   :issue:`18020`.)
 
+* On Windows, the native ``VirtualAlloc`` is now used instead of the CRT
+  ``malloc`` in ``obmalloc``.  Artificial benchmarks show about a 3% memory
+  savings.
+
 
 Deprecated
 ==========
@@ -1683,6 +1688,10 @@ Changes in 'python' command behavior
   CPython interpreter is now off by default.  It can be re-enabled using the
   ``-X showrefcount`` option. (Contributed by Ezio Melotti in :issue:`17323`.)
 
+* The python command and most stdlib scripts (as well as :mod:`argparse`) now
+  output ``--version`` information to ``stdout`` instead of ``stderr`` (for
+  issue list see :ref:`other-improvements-3.4` above).
+
 
 Changes in the Python API
 -------------------------