[RFE] calm needs to know about ZStandard compressed archives

[Achim Gratz]

Jon Turney writes:
> This is also deployed on sourceware.

At least one of xtarfile or zstandard Pythono modules seems to be
missing, though.  I tried to upload binutils and got this:

ERROR: exception NotImplementedError while reading /sourceware/cygwin-staging/home/Achim Gratz/x86/release/binutils/binutils-2.35.2-1-src.tar.zst


Regards,
Achim.
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