Lots of anomalous messages during update

[Hironobu Yamashita]

> I see files in C:\texlive\2020\tlpkg\tlgs\Resource\CIDFont.
> They have the right size to be otf files, but their extension is
> missing, is this expected?

Thank you for confirming.
Expected.  The extension needs to be removed, so that
the OTF file is treated as if it is a CID font by gs.

I think the warning message should be disabled
when copying file succeeds.  Will commit later...

Hironobu