Issue #20939: Backout test_urllib2.test_issue16464 disables:
    68335b8afb1f 3.4
    ad0c75b7bd7d default
Issue #20939: Use www.example.com instead of www.python.org to avoid test
failures when ssl is not present.
Issue #20939: remove stray character from comment
Issue #21069: Temporarily use www.google.com while investigating
test_urllibnet.test_fileno intermittent failures with www.example.com.
asyncio.tests: Autodiscover asyncio tests. Patch by Vajrasky Kok. Closes #20668
inspect: Fix getcallargs() to raise correct TypeError

... for missing keyword-only arguments. Patch by Jeremiah Lowin.
Closes #20816.
inspect: Fix getcallargs() to fail correctly if more than 3 args are missing.

Patch by Jeremiah Lowin. Closes #20817.
Issue #6676: Ensure a meaningful exception is raised when attempting
to parse more than one XML document per pyexpat xmlparser instance.
(Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
suggested wording by David Gutteridge)
Issue #17654: Ensure IDLE menus are customized properly on OS X for
non-framework builds and for all variants of Tk.
Doc: do not compress .epub for dist, it is already zipped.
undefine SET_SYS_FROM_STRING_BORROW after its done being used (closes #21089)
Issue 21014:  Use booleans instead of 0 and 1 in examples.
Issue #19697: Document cases where __main__.__spec__ is None.
Fix another old mention of "Standard Edition" VS in PCbuild/readme.txt.

Also removes a mention of using "Express Edition with the Windows SDK
64-bit compilers" to build 64-bit Python.  If that can be made to work,
it will need some extra instructions somewhere.
Issue #19697: document more __main__.__spec__ quirks
Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
copy of libz exists in $HOME/lib or /usr/local/lib.
Minor readability improvement.
Issue #21097: Move test_namespace_pkgs into test_importlib.
Fix doc typo.
Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.