In order to make the zperf to work regardless of the POSIX configuration
in the system, convert the socket API usage into Zephyr's native
zsock_* API.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Make a library out of the zperf shell sample. This makes to enable the
module in any application, not only the dedicated sample.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>