[PATCH] allow user-configurable menucolor

[Robert Millan]

This patch allows the following to work:

  set color_normal=cyan/blue
  set color_highlight=white/blue

which is equivalent to this command in GRUB Legacy:

  color cyan/blue white/blue

I haven't written a ChangeLog entry yet, because I'd like to receive comments
on the function names.  I don't really like `parse_single_color_name' and
`parse_color_name' but I don't know what to call them :-(.  What conventions
are there for referring to single colors (i.e. those that describe only FG or
only BG, not both) and complete colors (FG + BG) ?

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call, if you are unable to speak?
(as seen on /.)

menucolor.diff
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