zeromq/libzmq — pull request #683 by hintjens (2013-09-24 13:33:22+00:00)
Title: Updated libzmq CURVE to track RFC 27

* The INITIATE command vouch box is Box[C',S](C->S') instead of Box[C'](C->S),
as recommended by https://codesinchaos.wordpress.com/2012/09/09/curvecp-1/,
to reduce the risk of client impersonation.

* Mirrors the change in libcurve and CurveZMQ specifications.