Issue #19972: Add rarely used freefunc.  This fixes a leak if sys.exit()
is used in a program.
#19970: fix additional typo in 3.4 asyncio docs.
Issue #17919: Fixed integer overflow in the eventmask parameter.
Issue #17919: Fixed integer overflow in the eventmask parameter.
Issue #19623: Fixed writing to unseekable files in the aifc module.
Issue #19623: Fixed writing to unseekable files in the aifc module.
Issue #17576: Removed deprecation warnings added in changeset 618cca51a27e.
Null merge