[M. Update] net/py-zmq 17.1.2

[Elias M. Mariani]

This diff can now be reapplied (py-zmq was rollbacked to 16) now
working with the versions of matplotlib (thanks Daniel Dickman),
py-ipython and py-ipykernel.

Thanks to Björn Ketelaars for the help with this one.

Cheers.
Elias.

py-zmq.diff
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