adding licence

re-enable AI_V4MAPPED on FreeBSD & DragonFlyBSD

fix a typo - assigment was used instead of comparison

Detect AI_V4MAPPED is not supported in getaddrinfo() on the fly
and retry query. This issue was seen on ancient FreeBSD releases
and current implementation does support this flag correctly.

choose IP(v6) address based on ipv6_ flag in a correct way

* Relicense Grant - Thomas Rodgers (rodgert@twrodgers.com)

Add relicense grant for eburkitt

Problem: typos in RELICENSE/ptroja.md

cmake: Use LOCATION property only for imported targets

Newer CMake versions allow use of the LOCATION target property only for
imported targets (CMP0026). Because the old package variables are only
needed for backward compatibility after configuration they could be
deactivated for super projects which build ZeroMQ together with other
projects.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

cmake: Remove build/msvc include path to remove file name clash

Remove the `build/msvc` include path from the test project to fix a
problem with the order of the include paths. Additionally remove the
unnecessary `include_directories` from the master project.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

CMake: Add cross compiling support and export targets to package config

appveyor: Use correct CURVE security options

The AppVeyor build test options mismatch between command line options
and CMake CURVE security options. Rename the command line options to
the correct names.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

RELICENSE: mauri-melato grant

Update the mauri-melato libzmq fork

Relicense

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>

RELICENSE: Jake Cobb grant

RELICENSE : Bruno Bodin grant

Solution: fill in the missing fields

Unnecessary dynamic memory allocation in zmq_poller_poll()