bug#53739: 28.0.91; "C-x d" fails when "emacs -Q" starts on NetBSD with plan9/bin on head of PATH

[Eli Zaretskii]

> Date: Thu, 3 Feb 2022 13:05:27 +0000 (UTC)
> From: Van Ly <van.ly@sdf.org>
> cc: Eli Zaretskii <eliz@gnu.org>, 53739@debbugs.gnu.org
> 
> Maybe the user can have their cake and eat it.  What if Emacs ignores 
> the PATH element containing plan9/bin and the shell environment 
> outside Emacs is allowed to prefer plan9's commands?

Emacs doesn't use PATH, it uses exec-path.