handle bind error in make_fdpair() win32 codepath

Revert "Make FD_SETSIZE = ZMQ_MAX_SOCKETS_DFLT + 1 so there is room for ...

Removing C++11 code.

This reverts commit 0b92831b.

Update signaler make_fdpair to set file descriptors to -1 when too many ...

Update signaler make_fdpair to set file descriptors to -1 when too many files are open using socketpair.

Fix socket creation above sistem limits for all 'other' OS not covered b...

Fix socket creation above sistem limits for all 'other' OS not covered by eventfd, windows or vms; enhanced test to create sockets up to a bigger limit to really test hitting the OS limit

Added ignore test case

Signal that the peer performed orderly shutdown

Make FD_SETSIZE = ZMQ_MAX_SOCKETS_DFLT + 1 so there is room for the reaper socket

Get maximum number of sockets it can handle from poller_t

Fixing broken build issue #583

Add test case for many sockets

Simplified error handling for make_fdpair on Windows

Fixing issue #583. Using low resolution timer for clock::now_ms

Fix for issue 574

Modified the zmq_setsockopt documentation to include the ZMQ_ROUTER_HAND...

Fix race condition on shutdown