Fix test_bytes when sys.stdin is None, for example on Windows when using
pythonw.exe instead of python.exe
Issue #21704: Fix build error for _multiprocessing when semaphores
are not available.  Patch by Arfrever Frehtes Taifersar Arahesis.
(Merge 3.4) Fix test_bytes when sys.stdin is None, for example on Windows when
using pythonw.exe instead of python.exe
Issue #21704: Merge.
Fix sporadic failure of test_pep277 on Windows: use support.rmtree() instead of
deltree().
(Merge 3.4) Fix sporadic failure of test_pep277 on Windows: use
support.rmtree() instead of deltree().
Issue #11453, #18174: Fix leak of file descriptor in test_asyncore
(Merge 3.4) Issue #11453, #18174: Fix leak of file descriptor in test_asyncore
Issue #18174: Fix leak of file descriptor in test_tempfile
(Merge 3.4) Issue #18174: Fix leak of file descriptor in test_tempfile
Issue #17172: Add the ability to run turtledemo from Idle.
Make turtledemo start as active on Mac even when run with subprocess.
Patch by Ramchandra Apt, Lita Cho, and Ned Daily.
Merge with 3.4
Issue #17172: add NEWS
Merge with 3.4