BSD nc was commonly available on the current distros until Fedora 18
appears to have dropped it. socat appears to be a reasonable replacement
with availability on Fedora and Ubuntu and going back some time as well.
Update the script to use the socat syntax.
Simplify the logic a bit by using exec for the no-proxy-needed cases.
Signed-off-by: Darren Hart <dvhart@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
