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).