Patch by Louie Lu.

Fix logic for retrying nuget.exe download with Python.
Add support for HOST_PYTHON variable.
Clear internal environment variables used in find_python.bat
Use HOST_PYTHON as the actual Python if it is recent enough.
Adds HOST_PYTHON variable to AppVeyor configuration

* bpo-30794: added kill() method to multiprocessing.Process

* Added entries to documentation and NEWS

* Refactored test_terminate and test_kill

* Fix SIGTERM and SIGKILL being used on Windows for the tests

* Added "versionadded" marker to the documentation

* Fix trailing whitespace in doc

* Remove obsolete fallback code in readline module

* Add NEWS

* Remove obsolete include

* Fix macro on Windows

* bpo-30450: Fall back to git.exe if no Python is found.

* Also check whether git.exe is on PATH if it will be used.

* bpo-30450: Adds alternate download approach for nuget.exe

* Whitespace fix.

* Improve signal delivery

Avoid using Py_AddPendingCall from signal handler, to avoid calling signal-unsafe functions.

* Remove unused function

* Improve comments

* Use _Py_atomic API for concurrency-sensitive signal state

* Add blurb

Updates ssl and tkinter projects to use pre-built externals

* Add section to idlelib/idle-test/README.txt.
* Include check that branches are taken both ways.
* Exclude IDLE-specific code that does not run during unit tests.

AIX uses iso8859-1 in the C locale, not ASCII

AIX doesn't currently provide any of the locale
coercion locales, but we leave locale coercion
enabled in case one gets added in the future.

The will help writing dialog improvements and splitting the class into multiple classes.
Original patch by Cheryl Sabella.

Initial patch by Louie Lu.

bpo-30731: python.manifest fix

encoder and decoder.

when pass bad strict argument.

Changed "subbset" to "subset". Also made the sentences read like things were happening instead of stating what the code should do (in other words more descriptive than prescriptive).

Patch by Louie Lu.

tearDown() now clears explicitly the self.server variable to make
sure that the thread is completely cleared when tearDownClass()
checks if all threads have been cleaned up.

Fix the following warning:

$ ./python -m test --fail-env-changed -m test.test_os.TestSendfile.test_keywords -R 3:1 test_os
(...)
Warning -- threading_cleanup() failed to cleanup 0 threads after 3 sec (count: 0, dangling: 2)
(...)
Tests result: ENV CHANGED

instead of failing with SystemError.

Relative import from non-package now fails with ImportError rather than
SystemError.

Also improve test of config.ConfigChanges.delete_section.
Original patch by Cheryl Sabella.

Patch by Cheryl Sabella.

Based on patch by Victor Stinner.

called with bytes-like argument.

* Rewrite importlib _get_module_lock(): it is now responsible to hold
  the imp lock directly.
* _find_and_load() now holds the module lock to check if name is in
  sys.modules to prevent a race condition

Handle getattr(copy, 'deepcopy') error in _elementtree module
initialization.

One is a duplicate, one is set but cannot be altered by users.
Patch by Cheryl Sabella.

multiprocessing.Queue.join_thread() now waits until the thread
completes, even if the thread was started by the same process which
created the queue.

Fix the following warning which occurs randomly when running
test_handle_called_with_mp_queue of test_logging.QueueListenerTest:

Warning -- threading_cleanup() failed to cleanup -1 threads after 4 sec (count: 0, dangling: 1)