bug#45821: Emacs UDP support on Windows

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  "45821@debbugs.gnu.org"
>  <45821@debbugs.gnu.org>
> Date: Thu, 12 Jan 2023 10:22:17 +0100
> 
> >>>>> On Wed, 11 Jan 2023 13:23:03 +0000, Alex Matei 
> >>>>> <matei.alexandru@live.com> said:
> 
>     Alex> ✅Network tests are passing in WSL Emacs.. => Windows has issues, 
> and might have always had them? 🤷‍♂️
> 
> Thatʼs without a doubt true. Iʼm using MSYS2 to build Emacs and run
> the tests, Iʼve not tried WSL at all. Eli, what environment should we
> be using to build and test Emacs on MS-Windows? I know there are
> legion, and I always forget the differences.

The environment should be native Windows, not WSL.  WSL is Unix
running in a VM.

As for "using MSYS2", if that boils down to invoking Emacs from the
MSYS2 Bash prompt, it is still native Windows, and should not affect
the tests.