• Add a temp fix for zmq4 and ipv6

This patch is from

https://github.com/freebsd/freebsd-ports/pull/31

which s based on

https://github.com/zeromq/zeromq4-1/commit/81464652d2453c608bbbb52fd59e9e9f20857178

Submitted by: melvyn-sopacua (on github)
Approved by: koobs (maintainer)
MFH: 2015Q3