Minor changes to tools to help this:
add_dirs: only create directories if they don't exist.
scanpackages: added a command line flag to not create Packages.cd files
* Patch from Michael Schlueter for a bugfix related to forcenonusoncd1.
* Patch from myself : s/*.packages/?.packages/ in tools/scanpackages !
It's a problem that appeared with the use of FORCENONUSONCD1 and LOCAL.
first CD where possible. We then make 2 copies of this, one with
non-US and one without. Useful for people wanting to create non-US and
US-safe CD sets without having to spend so much disk space.
Side-effects: The CD tress are now $(DIR)/CD<foo> instead of
$(DIR)/<foo>