Process UDP SSF packets in parallel
Process UDP SSF packets in parallel

This brings the SSF listener up to par with the statsd processor,
allowing us to use parallelism to hopefully read the all SSF packets
our services generate in time.

gphat/veneur,evanj/veneur,gphat/veneur,stripe/veneur,stripe/veneur,gphat/veneur,evanj/veneur,evanj/veneur