Do positive DNS tests
<armadev> yep. do we do some 'positive' dns tests too? that is, if we can't
resolve google or cnn or akamai, maybe we can't resolve anything.
<armadev> mikeperry found some relays that can't resolve anything
Maybe we should add some more tests to see if some well-known sites can
be resolved. Also, we should probably wait with publishing the descriptor
until DNS tests have run.
[Automatically added by flyspray2trac: Operating System: All]
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