Without this patch python will fail to start properly when the environment
variable MACOSX_DEPLOYMENT_TARGET is set on MacOSX and has a value that is
not compatible with the value during Python's build. This is caused by code
in sysconfig that was only meant to be used in disutils.

the expected builtin modules are not present.

This includes a unittest for __get_builtin_constructor() in the face
of such an error.

attribute when called without a max_length argument.

Backport 70055:35ed0efd7dd3

type of I/O sequence on a file opened in read+write mode (namely: reading,
seeking a bit forward, writing, then seeking before the previous write but
still within buffered data, and writing again).

#12051: Fix segfault in json.dumps() while encoding highly-nested objects using the C accelerations.

order to accept exactly one connection.  Patch by Daniel Evers.

OpenSSL is now compiled with OPENSSL_NO_SSL2 defined (without the SSLv2
protocol) on Debian: fix the ssl module on Debian Testing and Debian Sid.

Optimize also ssl.get_protocol_name(): speed does matter!

CTRL+c, clear the end-of-file indicator after CTRL+d.

Patch by Arfrever Frehtes Taifersar Arahesis.

#11910: change import_fresh_module to return None when one of the "fresh" modules can not be imported.

#12017: Fix segfault in json.loads() while decoding highly-nested objects using the C accelerations.

Also, reduce code duplication in LargeMmapTests.

Original patch by Steffen Daode Nurpmeso.

(instead of a buffer of 2 GB)