[tor-relays] BitTorrent complaint

[grarpamp]

> tor could easily be made to efficiently use a similar mechanism, if it
> doesn't already in order to perform the lookups to compute the answer to
> "What is the subset of exit nodes allowing exit to IP addr X on port Y?"

The answer may lie with the client polling some exits and computing
the answer to its needs locally. I just posted a blurb about this
to tor-dev. Anyone interested may want to follow up and add on
over there.