testutil: peer gen with addrs
net: testing protocol
net/stream: exposed way to get SwarmStream
net: cool test for new stream backpressure

Sadly, as cool as this test is, it doesn't work
Because spdystream doesnt handle stream open backpressure
well. I'll see about rewriting that part when it becomes
a problem. More backpressure tests comming.
net: sending backpressure test