bug#24514: 24.5; [WIP][PATCH] Lispy backtraces

[Eli Zaretskii]

> Date: Fri, 30 Sep 2016 12:29:56 +0200
> From: Vasilij Schneidermann <v.schneidermann@gmail.com>
> Cc: 24514@debbugs.gnu.org
> 
> > Two minor nits to make this patch perfect:
> > 
> >   . Add the variable to cus-start.el, so that it will be a defcustom
> >   . Add a NEWS entry and mention the variable in the ELisp manual
> 
> I've done these and changed the commit message to comply better with the
> changelog style.  Let me know if there's still something off.

Thanks, pushed to master.

The log entry need some tweaking to bring it to our standards; see my
commit for what was needed.

If this bug can be closed now, please do.