nuttcp is a network performance measurement tool intended for use by
network and system managers. Its most basic usage is to determine the
raw TCP (or UDP) network layer throughput by transferring memory
buffers from a source system across an interconnecting network to a
destination system, either transferring data for a specified time
interval, or alternatively transferring a specified number of bytes.
ClosesHomebrew/homebrew#9840.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>