module directory has changed (eg. "darwin-2level" vs.
"darwin-thread-multi-2level").
binary packages of perl modules need to be distinguishable between
being built against threaded perl and unthreaded perl, so bump the
PKGREVISION of all perl module packages and introduce
BUILDLINK_RECOMMENDED for perl as perl>=5.8.5nb5 so the correct
dependencies are registered and the binary packages are distinct.
addresses PR pkg/28619 from H. Todd Fujinaka.
The Digest::Hashcash Perl module calculates n-bit partial hash
collisions on chosen texts.
The idea of using partial hashes is that they can be made arbitrarily
expensive to compute (by choosing the desired number of bits of
collision), and yet can be verified instantly. This can be used as the
basis for an e-cash system measured in burnt CPU cycles. Such cash
systems can be used to throttle systematic abuses of un-metered internet
resources.
