bug#8517: Can't handle utf8 encoded filenames in locale 'de_DE.utf8'

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 8517@debbugs.gnu.org,  611396-forwarded@bugs.debian.org,
>   gernotk@gmail.com,  rlb@defaultvalue.org
> Date: Fri, 23 Aug 2019 02:16:34 +0200
> 
> The user had
> 
> (current-language-environment "German")
> 
> in ~/.emacs, and was surprised that this overrode the LANG settings.
> But like I tried to say, that's what that invocation does, so this works
> as designed.  (And the user should remove that setting.)

The user should either remove that setting or follow it by

  (prefer-coding-system 'WHATEVER)

if the default preferences are not to their liking.