Corrects ypipe initialization when conflate is NOT enabled.

Fixes LIBZMQ-584

Adds support for detecting ZMQ_STREAM disconnections.

Fixes CMake build after ZAP test file was deleted.

File was removed in 5bf96f64 a few days ago.

When a ZMQ_STREAM socket connection is broken (intentionally, via `shutdown()`
or accidentally via client crash or network failure), there is no way for the
application to dertermine that it should drop per-connection data (such as
buffers).

This contribution makes sure the application receives a 0-length message to
notify it that the connection has been broken.  This is symmetric with the
process of closing the connection from within the application (where the
application sends a 0-length message to tell ZeroMQ to close the connection).

Conflicts:
	CMakeLists.txt

Define NOMINMAN to fix windows build.

use version-script only for ELF linux

Fix compilation on Windows (MinGW-w64)

Implement socket_base_t::get_credential member function

The get_credential () member function returns
credential for the last peer we received message for.
The idea is that this function is used to implement user-level API.

Only export zmq_* symbols

Fix timestamp counter on s390/s390x

Fixes #811

windows: changed tcp port from glrpc assigned to unassigned one

cmake: fixed error 'install TARGETS given no ARCHIVE DESTINATION'

Replace assert with zmq_assert

Fix some comments regarding method overriding

Make it explicit that the probe function doesn't modify passed message

ZMQ_SRCFD docs and tests

Also moved the fd field from message content to message itself

Simplify ypipe_t and ypipe_base_t template parameters

Allow clients to get remote endpoint per message for TCP connections

This patch allows client applications to retrieve the remote endpoint from a message that originated from a tcp socket

Update test_filter_ipc to not use abstract socket.

This fixes the test on Mac OS X and SmartOS (probably other Solarises).
Also updates the sockets using ipc: to use DEALER sockets instead
of PAIR sockets.