luatex doesn't find files with non-ascii on windows

[Herbert Voss]

Am 27.10.19 um 17:22 schrieb Ulrike Fischer:
> I can't input files with umlauts/non-ascii on windows 10.
> 
> \input grüße
> \bye
> 
> leads to
> 
> 
> This is LuaTeX, Version 1.10.0 (TeX Live 2019/W32TeX)
> (format=luatex 2019.10.25)  27 OCT 2019 17:18
>   restricted system commands enabled.
> **test-utf8.tex
> (./test-utf8.tex
> ! I can't find file `grüße.tex'.
> l.220 \input grüße.tex
> 
> I tried also with luatex 1.11.1, and also in context. It fails
> everywhere. pdftex has no problem, in miktex it works too.

No problem on Linux with luatex 1.11.1

Herbert