Patch by Ian Cordasco, approved by Éric Araujo.

use patch context manager instead of decorator because the decorator 'leaks' metadata onto the function

Patch from Thomas Kluyver.

Patch by Claudiu Popa.

Patch from Thomas Kluyver.

due to possible uninitialized _config_vars.  Original patch by Alex Gaynor.

Issue #21722: The distutils "upload" command now exits with a non-zero return code when uploading fails.
Patch by Martin Dengler.

in order to have the same resolution as pthreads condition variables.
At the same time, it must be large enough to accept 31 bits of
milliseconds, which is the maximum timeout value in the windows API.
A PY_LONG_LONG of microseconds fullfills both requirements.
This closes issue #20737

When running external programs such as a C compiler and getting an
error code, distutils only prints the program name.  With this change,
one can get the full command line by setting the DISTUTILS_DEBUG
environment variable.

This should have no compatibility issues, unless there are tools
that depend on the exact format of distutils debug messages.

Thanks to Amaury Forgeot d’Arc and Philip J. Eby.