[issue23026] Winreg module doesn't support REG_QWORD, small DWORD doc update

[Steve Dower]

Steve Dower added the comment:

I'd appreciate at least one other person looking over my commit before I close this, just to confirm that the notes I added to the docs are fine.

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stage:  -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23026>
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