bug#10107: 23.2; Add command gud-quit

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sun, 06 Jun 2021 14:50:23 +0200
> Cc: 10107@debbugs.gnu.org
> 
> Oh, I see -- you just want a command that kills the process in the
> current buffer?
> 
> Sure, that's something that I think sounds generally useful (for
> instance to kill an out-of-control process that's inserting something in
> the buffer), and there doesn't seem to be such a command?
> 
> The `delete-process' function does this (with no parameters it'll kill
> the process in the current buffer), so we could just slap an interactive
> spec on it and make it a command.  (Assigning a keystroke to it might
> perhaps be overkill.)

Why not invoke kill-process instead?