Only set sparcv9 optimization for sparc64 systems.
This allows to run for example application using zeromq
on sparc32 systems.
Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>

Problem: update zmq_setsockopt doc with new flag name

Fix compilation with mingw64 using autotools

VMCI family does not support non-blocking sockets.

It may even cause BSOD on Windows.

Windows Subsystem for Linux compatibility fix

On systems where getifaddrs() exists but isn't implemented, behave as if 'resolve_nic_name()' were entirely unsupported

Problem: msvc imports missing Rule.Category declarations.

Problem: style broken in src/windows.hpp

Solution:
Wrap to lte 80 chars and fix it.

Problem: no unit tests for base85 or public curve functions.

Problem: no function to derive public key from curve secret.

Problem: unresolved dgram externals in msvc builds.

Typo in define for libsodium

Since ZMQ_USE_SODIUM is nowhere defined i guess it's meant to be ZMQ_USE_LIBSODIUM?

Problem: Wrapping issue in test for SRCFD [style]

Solution:
Wrap it.

Problem: my name is not in the AUTHORS file

problem: no way to send raw udp messages with zeromq

problem: udp doesn't enforce correct usage of bind/connect

solution: enforce that dish and gram can only bind and radio can only
connect

problem: no way to send raw udp messages with zeromq.