Patch by Xavier de Gaye.

Patch Serhiy Storchaka.

Patch Serhiy Storchaka.

Patch Serhiy Storchaka.

This commit also simplifies the more advanced "yield from" example and removes
unused function parameters.

As stated in PEP 11, 3.4 removes code on Windows platforms where
COMSPEC points to command.com. The w9xpopen project in Visual Studio
was added to support that case, and there was a special case in subprocess
to cover that situation. This change removes the w9xpopen project from
the Visual Studio solution and removes any references to the w9xpopen
executable.

Patch by Anton Kasyanov.

Patch by Anton Kasyanov.

Patch by Anton Kasyanov.

Fix Issue15701 - HTTPError info method call raises AttributeError. Fix that to return headers correctly

Fix Issue15701 - HTTPError info method call raises AttributeError. Fix that to return headers correctly

Patch by Florent Xicluna.

Patch by Chris Jerdonek.

Patch by Chris Jerdonek.

Also fix Misc/ACKS to put part of it back in alphabetical order and
remove some duplicate names.

Patch by Berker Peksag.