Re: master daf008e82b: Note caveat about remapping basic faces

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Mon, 14 Feb 2022 19:20:40 +0800
> 
> Lars Ingebrigtsen <larsi@gnus.org> writes:
> 
> > No, and I'm not sure we want to document it.  I think explaining that
> > there are problems here is sufficient.
> 
> I think people will run into the problem (or potentially unrelated
> problems) with faces other than `mode-line', so it would be good to
> document which ones the problem can occur with.

Actually, we do have a section that describes the basic faces, so I
added a cross-reference there from the new text added by Lars.