On Sat, Nov 19, 2016 at 2:16 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>   . I'd rather have the WINDOWSNT-specific code separate (on w32.c),
>     so perhaps the for-loop you modified could be left intact, and
>     instead we perform an additional pass over Vprocess_environment,
>     after it is already copied, to replace these two variables with
>     their upper-case equivalents, in that special code on w32.c.

Okay, here is a patch that does that.

>  . If you didn't already, please verify that these 2 variables in the
>    Emacs's own environment are also upcased, because otherwise I
>    think we will hit more such problems.

That would be the for loop just above my additions (I increased the
context so it's fully visible in the patch).