r23531: added optional latency reporting in BENCH-NBENCH. To use it, you need

r23531: added optional latency reporting in BENCH-NBENCH. To use it, you need
to have a load file that puts a timestamp in the first column. That
tells NBENCH to target the same throughput as the capture, and to
report the maximum amount of latency miss in the test

This allows you to quickly see how many clients you can run with while
still meeting a given target
(This used to be commit 7f045ca4f5e3e777978cad39ac22f0c611af6b10)