bug#48949: 28.0.50; Thread-Process Liberalization

[Eli Zaretskii]

> From: dick.r.chiang@gmail.com
> Cc: 48949@debbugs.gnu.org
> Date: Sat, 12 Jun 2021 10:51:45 -0400
> 
> EZ> why not unlock the process, so that its output could be
> EZ> processed by any thread?
> 
> Yes, why don't I just call pset_thread(proc, Qnil) when the mood strikes in
> process.c?  You make it sound as if pset_thread is an exposed defun.

No, I meant to use set-process-thread from Lisp.  That's what it is
for, and this stuff is documented in the ELisp manual.

(And I still don't fully understand why you'd need that, but if you
really do, you can; no C source-level changes needed.)