bug#44644: /tmp/emacs0/ not cleaned up upon exit

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Tue, 17 Nov 2020 00:06:43 +0100
> Cc: 44644@debbugs.gnu.org
> 
> 積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:
> 
> > Anyway leaving empty directories around after exit is bad when not root too.
> 
> True.  Looking at the code, it looks like having `server-start' add
> `server-force-delete' to `kill-emacs-query-functions' would do the
> trick?
> 
> Does anybody see any downsides to doing that?

What if the Emacs that's being killed is not the one that created the
server file?