bug#41147: A modern frame-title-format

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Sun, 23 Aug 2020 20:57:51 -0400
> Cc: 41147@debbugs.gnu.org
> 
> I think it makes sense to just do what other modern software does here.
> If people want to do something more fancy, they can easily modify it
> themselves.

There's no way to customize what "emacs -Q" produces, though, and the
patch changes that as well.

> How about the attached patch?  (NEWS and docs still needs updating.)

I think we need a broader user poll before we make such a change.  An
opinion of a couple of people is not enough.

Thanks.