[issue27731] Opt-out of MAX_PATH on Windows 10

[Steve Dower]

Steve Dower added the comment:

Just discovered that this actually requires enabling the group policy for long paths - specifically setting HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem at LongPathsEnabled to 1.

Apparently the manifest is also required, but in my testing the manifest is ignored and we just get long path support for free. So perhaps we should just add a message to file exceptions when the path is >260?

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<http://bugs.python.org/issue27731>
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