Added ZMQ_STREAM socket type

- designed for TCP clients and servers
- added HTTP client / server example in tests/test_stream.cpp
- same as ZMQ_ROUTER + ZMQ_ROUTER_RAW + ZMQ_ROUTER_MANDATORY
- includes b893ce set ZMQ_IDENTITY on outgoing connect
- deprecates ZMQ_ROUTER_RAW

src/socket_base.cpp

@@ -67,6 +67,7 @@
 #include "router.hpp"
 #include "xpub.hpp"
 #include "xsub.hpp"
+#include "stream.hpp"
 
 bool zmq::socket_base_t::check_tag ()
 {
@@ -112,6 +113,9 @@ zmq::socket_base_t *zmq::socket_base_t::create (int type_, class ctx_t *parent_,
     case ZMQ_XSUB:
         s = new (std::nothrow) xsub_t (parent_, tid_, sid_);
         break;
+    case ZMQ_STREAM:
+        s = new (std::nothrow) stream_t (parent_, tid_, sid_);
+        break;
     default:
         errno = EINVAL;
         return NULL;