robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.

Patch by Marc Abramowitz.

Patch by Karan Goel.

This allows use with special filesystems such as VirtualBox shared folders.

Patch by Francis MB.

Pointed out by Arfrever.

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