RELNOTESTAG specifies a CVS tag to use for checking out release
documeentation.
Complain if CVSROOT or DOCROOTDIR aren't defined.
Move all the original doc stuff into a doc/ subdirectory in the
FTP and ISO staging areas, to avoid further cluttering of the top-level
directories.
and to reduce runtime dependencies. (Basically we get rid of PS,
because PDF is probably more widely used; html-split.tar, because
it's probably not that useful on an ISO image; and pdb, to get rid
of a dependency on iSilo).
Change volume title and publisher of ISO image to match precedent
of the real release ISOs.
documentation by default, and the CDROM area doesn't (to avoid cluttering
up directories).
Also include a PGP key ring in the build, and tweak texts slightly.
