melanie witt fc572a5da0 Add --tcp option to dstat command for connection stats
This enables tcp stats (listen, established, syn, time_wait, close) in
dstat to allow us to get a high-level view of performance changes in
the system during gate runs.

Change-Id: Ifbffbed22446e7e6a3b825c18266b63d2f2e7718
2017-05-17 19:05:56 +00:00
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