bug#21612: 24.5; Configuration variable to delete auto-save file when intentionally killing buffer

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: mrok4a@gmail.com,  21612@debbugs.gnu.org
> Date: Mon, 16 Aug 2021 15:52:15 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > So I think it's okay to have such a feature, but:
> >
> >   . it should be OFF by default; and
> >   . it should NOT by default ask the additional question
> 
> So just delete the auto-save files automatically if you have the option
> switched on and you're killing an unsaved buffer?
> 
> I think this sounds too dramatic to be useful, even as an option.

When the option is switched ON, I'm okay with asking the question.  I
just don't think we should ask it when the option is OFF.