[zeromq-dev] Assert if setsockopt wrong used

[Pieter Hintjens]

Hi all,

Problem: people using setsockopt wrongly get weird downstream
behaviours that can take time to debug if they don't systematically
check their return codes.

Solution: libzmq should assert if passed an invalid getsockopt or setsockopt.

Thoughts? Seems a valid use for assertions. I'll write this up as an
issue there's consensus.

-Pieter