Hello,

Please see the attached patch that allows one to define a different face
to be shown when being displayed on the tty rather than with a windowing
system.

Some background: I use hl-sexp-mode when editing lisp code and I
frequently edit through ssh as well as on the console; naturally I use
the Emacs daemon to achieve this.  However, the color schemes that I use
on the tty and the windowing system are quite different and I find
myself flip-flopping between colors for the background face of
hl-sexp-face as it is unreadable when switching to a tty editing session
form the windowing-system session.

To overcome this I decided it would be a good idea to create a second
set of 'tty' face attributes that, when defined, overwrite the windowing
system colors but only when displayed on a tty.

Any comments are welcome.

Thanks,
-- 
Matt