- On some versions of FreeBSD, setting the "UTF-8" locale
  succeeds, but a subsequent "nl_langinfo(CODESET)" fails
- adding a check for this in the coercion logic means that
  coercion will happen on systems where this check succeeds,
  and will be skipped otherwise
- that way CPython should automatically adapt to changes in
  platform behaviour, rather than needing a new release to
  enable coercion at build time
- this also allows UTF-8 to be re-enabled as a coercion
  target, restoring the locale coercion behaviour on Mac OS X

* bpo-30796: Fix failures in signal delivery stress test

setitimer() can have a poor minimum resolution on some machines,
this would make the test reach its deadline (and a stray signal
could then kill a subsequent test).

* Make sure to clear the itimer after the test

Only report a leak if each run leaks at least one memory block.

`PYTHONFRAMEWORK` is defined in `Makefile` and it shoulnd't be used
in `pyconfig.h`.

`sysconfig.py --generate-posix-vars` reads config vars from Makefile
and `pyconfig.h`.  Conflicting variables should be avoided.

Especially, string config variables in Makefile are unquoted, but
in `pyconfig.h` are keep quoted.  So it should be private (starts with
underscore).

* Improve signal delivery

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

* Remove unused function

* Improve comments

* Add stress test

* Adapt for --without-threads

* Add second stress test

* Add NEWS blurb

* Address comments @haypo

* bpo-23451: Fix WSASocket and WSADuplicateSocket deprecation warnings

* bpo-23451: Add backwards compatibility note about socket share/fromshare

* bpo-23451: Fixed `WSAAddressToString`/`WSAStringToAddress` deprecation warnings

* bpo-23451: Use `inet_pton`/`inet_ntop` instead of `WSAAddressToString`/`WSAStringToAddress`

* bpo-23451: Move `HAVE_INET_PTON` from _socket.vcxproj to pyconfig.h

* bpo-23451: Add SUPPRESS_DEPRECATED_CALL to socketmodule.c

* bpo-23451: Add a NEWS.d entry

* bpo-23451: Corrected NEWS.d entry

* bpo-30362 Add list options to launcher.

* bpo-30362 Add list options to help message.

* To avoid possible later conflict with python replaced flags with --launcher-list and --launcher-list-paths

* bpo-30362 Changed flag to -0 as suggested on review.

* bpo-30362: Modified to default to not path for -0, -0p to dispaly path and append * to default

* bpo-30362: Modified to display list on required version not found.

* bpo-30362 add --list and --list-paths added back in following review by paul.moore

* bpo-30362 Cleaner handing of -0 & -0p by not calling exit directly per review by @zooba

* bpo-30362: Tidy up and add news & what's new

Removed commented out line of code in PC/launcher.c.
Added the results of using blurb to add details of bpo-30362 & bpo-30291.
Updated Doc/whatsnew/3.7.rst to add a Windows only section covering both tickets.

* bpo-30362 Resolve conflict in Doc/whatsnew/3.7.rst

* bpo-30362:Address Whitespace Issue in Doc\whatsnew\3.7.rst

* Shorten NEWS message for bpo-30362

* Shorten NEWS item for bpo-30291

* bpo-29585: Fix PC/pyconfig.h whitespaces

Run "make patchcheck".

* bpo-29585: Define PYTHONFRAMEWORK in PC/pyconfig.h

* site: Fix path separator in _get_path() on Windows

Avoid importing `sysconfig` from `site` by copying minimum code.
Python startup is 5% faster on Linux and 30% faster on macOS

* Clear potential ref cycle between Process and Process target

Besides Process.join() not being called, this was an indirect cause of bpo-30775.
The threading module already does this.

* Add issue reference

Forgetting to call Process.join() can keep some resources alive.

Based on patch by Victor Stinner.

Add private C API function _PyUnicode_AsUnicode() which is similar to
PyUnicode_AsUnicode(), but checks for null characters.

Patch by Mark Roseman

* Add 'parens' style to highlight both opener and closer.
* Make 'default' style, which is not default, a synonym for 'opener'.
* Make time-delay work the same with all styles.
* Add help for config dialog extensions tab, including parenmatch.
* Add new tests. 
Original patch by Charles Wohlganger.

Add a new "python3 -m test.bisect" tool to bisect failing tests.

It can be used to find which test method(s) leak references, leak
files, etc.

Free also co_extra->ce_extras, not only co_extra.

Clarify that the break statement breaks out of the innermost enclosing for or while loop.

Raise a ValueError if the second argument is NULL and the wchar_t\*
string contains null characters.

Patch by Cheryl Sabella

This happened because shortcut has a class binding and 'break' was not returned.
Fix other potential conflicts between IDLE and default key bindings.

* Add news item

* Update NEWS

Patch by Cheryl Sabella.

New error condition paths were introduced, which did not decrement
`key2` and `val2` objects.  Therefore, decrement references before
jumping to the error label.
Signed-off-by: Eric N. Vander Weele <ericvw@gmail.com>

* Change the regrtest --huntrleaks checker to decide if a test file
  leaks or not. Require that each run leaks at least 1 reference.
* Warmup runs are now completely ignored: ignored in the checker test
  and not used anymore to compute the sum.
* Add an unit test for a reference leak.

Example of reference differences previously considered a failure
(leak) and now considered as success (success, no leak):

    [3, 0, 0]
    [0, 1, 0]
    [8, -8, 1]

Also, change '*' in the tkinter import to an explicit list of names.
Patch by Cheryl Sabella.

Leading whitespace was incorrectly dropped during folding of certain lines in the _header_value_parser's folding algorithm.  This makes the whitespace handling code consistent.

* bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to lock

This is especially important if PyThread_acquire_lock() is called reentrantly
(for example from a signal handler).

* Update 2017-06-26-14-29-50.bpo-30765.Q5iBmf.rst

* Avoid core logic when taking the mutex failed

* bpo-30764: regrtest: change exit code on failure

* Exit code 2 if failed tests ("bad")
* Exit code 3 if interrupted

* bpo-30764: regrtest: add --fail-env-changed option

If the option is set, mark a test as failed if it alters the
environment, for example if it creates a file without removing it.

bpo-30764, bpo-29335: test_child_terminated_in_stopped_state() of
test_subprocess now uses support.SuppressCrashReport() to prevent the
creation of a core dump on FreeBSD.

* regrtest --list-cases now supports --match and --match-file options.
  Example: ./python -m test --list-cases -m FileTests test_os
* --list-cases now also sets support.verbose to False to prevent
  messages to stdout when loading test modules.
* Add support._match_test() private function.

Verify user-entered key sequences by trying to bind them with tk.
Add tests for all 3 validation functions.
Original patch by G Polo.  Tests added by Cheryl Sabella.

in `os.putenv()` and `os.spawn*()`.

* Fix bpo-30596: Add close() method to multiprocessing.Process

* Raise ValueError if close() is called before the Process is finished running

* Add docs

* Add NEWS blurb