[Issue 19756] Add extended attributes support to std.file

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19756

--- Comment #2 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
I think those are the alternate data streams I mentioned. NTFS extended
attributes ("EA") are different. See e.g. the documentation for ZwQueryEaFile.

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