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
are referred to in the Packages files. Closes: #76178
* Does now handle sources for a local repository correctly. Closes: #76179
* Fix a bug in make extras. Closes: #76181
* Added a commodity local symlink for old-fashioned tools like multi_cd
which want local packages in dists/local/local. Closes: #76186
* Many thanks to Vladimir Michl who provided me patches for the 4 bug
mentionned above.
* Changed mirror_check to use case insensitive pattern matching for
detecting headers. Closes: #70838
* Documentation updates about the SIZELIMIT stuff and bootable CDs.
Closes: #72067, #68913