useful to others:
- allow to use different name for final iso image;
- allow to set the script to be used in debootstrap to check if all
base need package are present;
files on each CD/DVD; instead grab the details for each package
directly from the Packages file in the archive. MUCH MUCH faster,
and uses less code too. Affected scripts:
+ tools/scanpackages now just generates Release files. argv[1] used
to be "scan" or "install", but no longer used
+ tools/add_debs slightly simplified - old code removed
+ tools/add_packages now dumps out Packages file fragments as each
.deb and .udeb is copied into the temporary trees
+ WARNING: Any uses of the "before-scanpackages" hook may now break
- shout if you're affected.