bug#58281: 27.1; windows mangles encoding on command line

[Eli Zaretskii]

> From: Daniel Bastos <dbastos@id.uff.br>
> Date: Wed, 12 Oct 2022 08:49:32 -0300
> Cc: 58281@debbugs.gnu.org

In addition to what I just wrote, please try this: As soon as you
start Emacs, type:

  M-: (setq default-process-coding-system '(undecided-dos . cp850-dos)) RET

Then enter Eshell and try the fossil command you tried before.  See if
this solves the problem.

I think I found a bug in Eshell that the above workaround should
side-step.