Extra connection diags

When debugging a heavily loaded system, I wanted to find the TCP stream associated with a specific connection. However, it was hard to correlate that with an individual request from the logs. It would have been useful if we logged out four of the five fields of the connection five-tuple, making it possible to easily identify what TCP stream is associated with a request.

I appreciate this adds some SLOC for something that might be of minimal value, but I wanted to offer it as an option. It's totally reasonable to reject this, won't bother me overmuch: only took 5 minutes to whip up anyway. =)