As pkgin's database format change during its development, here is a
quick note on how to easily retrieve your datas. In fact, the only
information (for now) that is not automatically recoverable is the
keepable-packages list. Simply record them this way :

	# pkgin show-keep | cut -d' ' -f1 > keep.list

Delete your current database

	# rm -rf /var/db/pkgin

If you are using pkgin's CVS version, also delete the pkgindb_create.h
file from the source tree

	# rm -f pkgindb_create.h

After rebuilding pkgin, update its database

	# pkgin update

Then record your keepable packages again

	# for pkg in `cat keep.list`; do pkgin keep $pkg; done
