Fixed goclient due to go zmq library

goclient: Fix client due to GoZMQ library changes

Used gozmqfix

While trying to reproduce your setup on my Ubuntu machine I faced an issue with goclient due to gozmq library changes as state here: https://github.com/alecthomas/gozmq

I applied the gozmqfix and here is the delta if you want to integrate.

Best regards,
Benito