Default mm-uu-extract face hard to read on ttys

[Sascha Wilde]

Hi *,

The default mm-uu-extract face is hard to read on ttys, as it defaults
to light yellow on dark green, which gets translated to white on
(bright) green on 8 color tty.

It is used for highlighting text in messages which is marked a verbatim:

--8<---------------cut here---------------start------------->8---
this is an example
--8<---------------cut here---------------end--------------->8---

cheers
sascha
-- 
Sascha Wilde : "Ist es nicht schon schlimm genug, dass ICH hier rumtrolle?"
             : (Henning Leise in d.o.c.)