When converting REG_DWORD registry values into Python ints, the conversion
needs to be made from an *unsigned* long to match the DWORD type.

Patch by Roger Serwy.

Patch by Roger Serwy.

This fixes an OverflowError seen in winreg.SetValueEx when passed
winreg.REG_DWORD values that should be supported by the underlying API.

Fixes handling of leading dots.

Patch by Serhiy Storchaka.

Fixes handling of leading dots.

Patch by Serhiy Storchaka.

Issue #14574: Ignore socket errors raised when flushing a connection on close.

This fixes the following warning when building the docs (probably from
the commit for issue #14901):

"/Doc/faq/windows.rst:138: WARNING: undefined label: setting-envvars (if the
link has no caption the label must precede a section header)"

This adds to the work done for issue #15990 (i.e. f44b8d69e5fc and the
commits referenced there).

This adds to the work done for issue #15990 (i.e. f44b8d69e5fc and the
commits referenced there).

Patch Serhiy Storchaka.

Patch Serhiy Storchaka.

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

Patch by Anton Kasyanov.