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.

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.

Fixes handling of leading dots.

Patch by Serhiy Storchaka.

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

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

This issue is now fixed due to changes in Issue #11939, so I've refactored
the tests to cover the hard link case. There are no code changes here.

By setting the st_dev attribute, we can then remove some Windows-specific
code and move os.path.samefile/sameopenfile/samestat to Lib/genericpath.py
so all platforms share the same implementation.

objects as the base by using PyNumber_AsSsize_t similar to round().