release:
- run 'make index' as part of release build, INDEX* files in
CVS no longer updated and likely to be removed from CVS soon
- don't include README.html files in ports.tgz tarball because
they cause cvsup problems for users later
- put a copy of /usr/ports on disc2 that does include README.html
files so users have access to them
Reviewed by: ru (found one bug, several clean-up suggestions)
Tested by: 'make release'
MFC before: BETA6 build (this isn't likely to be tested in -current
anyway...)