Make test.support.temp_cwd() fork-safe. The context manager test.support.temp_cwd() no longer removes the temporary directory when executing in a process other than the parent it entered from.
If a forked child exits the context manager it won't do the cleanup..
(cherry picked from commit 33dddac0)
Co-authored-by: Anselm Kruis <a.kruis@science-computing.de>

[2.7] bpo-31848: Fix broken error handling in Aifc_read.initfp() when the SSND chunk is not found (GH-5240) (GH-5781)

Initialize self._ssnd_chunk so that aifc.Error is raised as intended,
not AttributeError.
(cherry picked from commit 80d20b91)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

It's bad form to pin to an old version of TLS. ssl.SSLContext has the right
protocol default, so let's not pass anyway..
(cherry picked from commit e9edee0b)

(cherry picked from commit 08a6926b)
Co-authored-by: Éric Araujo <merwok@netwok.org>

(cherry picked from commit 7eb3f822)

Adapt documentation for `copyright` and `credits` to reality.  Previously, the documentation implied that all each of `copyright`,
`credits`, and `license`, would print a message to call the object in order to see the full text.  In reality, only `license` exhibits this
behaviour, and `copyright` and `credit` print their full text either when printed, displayed, or called.
(cherry picked from commit 243d6d71)
Co-authored-by: Gerrit Holl <gerrit.holl@gmail.com>

A closing parentheses was missing.
Signed-off-by: Ngie Cooper <yaneurabeya@gmail.com>
(cherry picked from commit 7745ec4e)
Co-authored-by: ngie-eign <1574099+ngie-eign@users.noreply.github.com>

Remove pkg_add -r python from FreeBSD installation section.
Moved to OpenBSD.
(cherry picked from commit 3384d38d)
Co-authored-by: Eitan Adler <grimreaper@users.noreply.github.com>

(cherry picked from commit 2b86f4cb)

It now processes files as binary streams.

This also fixes "make reindent".

It now reads: ...be aware that Python has no control over...
(cherry picked from commit 517da1e5)
Co-authored-by: Alexey <forestbiiird@gmail.com>

(cherry picked from commit 6ea20fc7)

(cherry picked from commit 28607e0d)

The new link is given in a red box on the old page.
(cherry picked from commit 8d1f2f40)
Co-authored-by: sblondon <sblondon@users.noreply.github.com>

Co-authored-by: Jake Davis <jcdavis@awedge.net>.
(cherry picked from commit 2411292b)

Use `f` as the name of the first parameter of `csv.DictReader` and
`csv.DictWriter` classes.

strop is highly legacy and can be safely compiled out in most installations. Let's not fail the test suite for its absence.

Manual backport of GH-5485

Clarify that the level argument is used to determine whether to
perform absolute or relative imports: 0 is absolute, while a positive number
is the number of parent directories to search relative to the current module..
(cherry picked from commit 461d225b)
Co-authored-by: oldk <oldk1331@users.noreply.github.com>

instead of crashing due to a stack overflow.

This perhaps will fix similar problems in other extension types.
(cherry picked from commit 1fb72d2a)

_test_multiprocessing.test_queue_feeder_donot_stop_onexc() now uses a
timeout of 1 second on Queue.get(), instead of 0.1 second, for slow
buildbots.

(cherry picked from commit 8f6eeaf2)

Patch by Bo Bayles.

It will be triggered when propagating an exception.
(cherry picked from commit 79db11ce)

(cherry picked from commit 9ed0aee2)

The nismodule is now compatible with new libnsl and headers location

Signed-off-by: Christian Heimes <christian@python.org>.
(cherry picked from commit 29a7df78)

In str.join, if any of the iterable contains a Unicode object,
str.join will return a Unicode object.

A Type error will be raised if iterable contains values other
than a string or Unicode object.

test_subprocess.test_leaking_fds_on_error() failed when the PATH
environment variable contains a path to an existing file. Fix the
test: ignore also ENOTDIR, not only ENOENT and EACCES.

(cherry picked from commit 131fd7f9)

glibc is deprecating libcrypt in favor of libxcrypt, however python assumes
that crypt.h will always be included. This change makes the header inclusion
explicit when libxcrypt is present on the system.
(cherry picked from commit e768c86e)

It should be `urllib2.URLError` instead of just `URLError`.

This test doesn't care about order, the underlying filesystem APIs do not
guarantee directory listings on subsequent calls will be in the same order.

(cherry picked from commit 7d91c025)

See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx?f=255&MSPPError=-2147217396#maxpath

Paths that begin with `\\?\` are "extended-length paths".

glibc has removed Sun RPC. Use replacement libtirpc headers and library in
nis module
Signed-off-by: Christian Heimes <christian@python.org>
(cherry picked from commit f3031b8a)

It's more trouble than it's worth, since AppVeyor only checks the HEAD commit of a PR rather than the full diff against the base branch to decide which files changed.
(cherry picked from commit 7f7de371)