ANN: H98 FFI Addendum 1.0, Release Candidate 10

[Ross Paterson]

Minor nits: there's a footnote saying "Finalizers in Haskell cannot
be savely [sic] realised without requiring support for pre-emptive
concurrency".  I'd suggest dropping "pre-emptive": with cooperative
concurrency it's perfectly safe to collect the finalizers in GC and fork
them next time you're back in the IO monad (though it's not very timely).