more LC changes

[Philip Blundell <philb@gnu.org>]

I've done a certain amount of violence to the various language
definition files (dbootstrap/langs/*.src) this afternoon.  This reflects
the new purpose of language subvariants, which are now intended to
reflect territories and not keymaps.  If your chosen language has only
one variant (e.g. german.src, which defines only de_DE) you will no
longer see the second level dialogue box.

The parser now ignores "arch" tags.  All variants are offered on all
architectures.  In many cases, there were several variants that seemed
to differ only in their keyboard map and were consequently redundant;
I've deleted these.

Also, I went through and amended some more locale strings.  The majority
of languages should now have three-element "language_TERRITORY.CHARSET"
strings.  I switched Euro-using countries to the Latin9/Latin16
character set variants and added @euro modifiers to the locales where it
seemed appropriate.  I've also arranged for en_GB to use the Latin9
character set; some other latin1 countries like Sweden and Denmark might
want the same but I will leave it to people with local knowledge to make
that decision.

p.