Subject: bug#40343: 28.0.50; dns-set-servers fails on IPv6 available Windows

From: Kazuhiro Ito <[email-masked]>
Date: Tue, 31 Mar 2020 20:06:50 +0900

>     Kazuhiro> dns-set-servers function fails to set dns-servers on Windows with IPv6
>     Kazuhiro> available network.
> 
>     Kazuhiro> (progn
>     Kazuhiro>   (require 'dns)
>     Kazuhiro>   (dns-set-servers)
>     Kazuhiro>   dns-servers)
> 
>     -> (nil)
> 
> dns.el isnʼt going to work on Windows anyway, since Emacs doesnʼt
> support UDP network processes on Windows.

Cygwin's Emacs, which seems to support UDP network processes, uses
Windows's nslookup.exe, so has this problem too.  

# Actually I don't directly use dns.el.  It is gravatar.el which uses
# dns.el.

-- 
Kazuhiro Ito