Update CZMQ (and ZMQ?) to latest version

Description

The old zstr_sendf implementation breaks if a formatted string longer than 255 bytes is sent (which is seldom the case, e.g. when a result message is sent). Updating czmq should solve this issue, but will most likely outdate some code.

Environment

None
Fixed

Assignee

Philipp Koerner

Reporter

Philipp Koerner

Priority

Blocker