Updated documentation for zmq_disconnect() and zmq_setsockopt().
use enum retired_fd instead of -1

using -1 causes a warning on Windows platform because SOCKET is unsigned.
Merge pull request #773 from hashstat/master

Add IPC accept filter support
Merge pull request #774 from shubred1/master

Updated documentation for zmq_disconnect() and zmq_setsockopt().
Merge pull request #775 from pijyoi/master

use enum retired_fd instead of -1
Fix failing test case in test_filter_ipc.

Add explicit check for primary group.