A tiny web server for checking networking connectivity.
Will dial out to, and expect to hear from, every pod that is a member of the service passed in the flag -service.
Will serve a webserver on given -port.
Visit /read to see the current state, or /quit to shut down.
Visit /status to see pass/running/fail determination. (literally, it will return one of those words.)
/write is used by other network test pods to register connectivity.