Add TCP support

[kobynet]

Statsd server support tcp connection as well as udp. This is sometimes needed especially for accurate counters.

[DarrellMozingo]

Hi Koby,

Do you have a use case for this now? I know statsd itself supports it, but has always seemed like a shoehorned piece. For accurate counters like this you'd probably want a proper logging platform. If it's going over an unreliable network I'd suggest carbon-relay?

[kobynet]

statsd/statsd#318 is a pretty good use case, especially when you do not have permission to change udp buffer size, and in general for sending big chunks (like Batched send etc.).

[pekiZG]

Is this "Up for grabs"?

[pekiZG]

@DarrellMozingo I had some free time and played around with it.
You can see the PR #59

[pekiZG]

Really close to being done with TCP support.
Could use second pair of eyes

[pekiZG]

Done
@kobynet and @DarrellMozingo
take a look at #59 and leave a comment.

[pekiZG]

from 1.3.43 version TCP client is available.

[DarrellMozingo]

Closed in #59 & live in 1.3.44. Thanks @pekiZG!