Test the performance of flow networking

The fdbserver binary has the ability to run as a networktestclient and a networktestserver. The provides a straightforward way to measure the throughput of the flow networking stack.

We should use this testing framework to compare the speed of flow networking against results from iPerf for different packet sizes and number of connections.

Start by locating the fdbserver networktestclient and networktestserver entry points. Run the existing network test framework and compare its throughput with iPerf across different packet sizes and connection counts. Done means the comparison is repeatable and the results are recorded clearly.

Written by the indexing model from the issue text.