[PATCH][PR server/24377] Fix mixing English and system default languages in error messages on Windows

[Eli Zaretskii]

> From: LRN <lrn1986@gmail.com>
> Date: Wed, 3 Apr 2019 07:58:44 +0300
> 
> > Beware: only the Cygwin setlocale supports environment variables, the
> > native MS-Windows implementation used by MinGW does not.
> > 
> 
> That's what gettext is for. And/or gnulib.

Won't happen unless Gnulib's setlocale is imported.  And the proposed
patch didn't do that, AFAIU.  (I don't see 'setlocale' in the Gettext
library, FWIW, so I don't think Gettext alone will solve this.)