bug#64423: 29.0.92; save-interprogram-paste-before-kill doesn't prevent streaming large selections

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: yantar92@posteo.net,  sbaugh@catern.com,  sbaugh@janestreet.com,
>   64423@debbugs.gnu.org
> Date: Wed, 05 Jul 2023 11:51:30 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > No, _all_ timers were implemented like that at the beginning, before
> > they were rewritten based on the Emacs main loop.
> 
> That's what I meant to say, thanks.

Also, FTR: that special subprocess didn't produce any output; instead,
it delivered SIGALRM to Emacs.