Add socket option "ZMQ_ROUTER_HANDOVER" (ZMQ 4.1)

binding.cc

@@ -1100,6 +1100,7 @@ namespace zmq {
     opts_int.insert(40); // ZMQ_XPUB_VERBOSE
     opts_int.insert(41); // ZMQ_ROUTER_RAW
     opts_int.insert(42); // ZMQ_IPV6
+    opts_int.insert(56); // ZMQ_ROUTER_HANDOVER
 
     opts_int64.insert(3); // ZMQ_SWAP
     opts_int64.insert(8); // ZMQ_RATE

lib/index.js

@@ -79,6 +79,7 @@ var longOptions = {
   , ZMQ_XPUB_VERBOSE: 40
   , ZMQ_ROUTER_RAW: 41
   , ZMQ_IPV6: 42
+  , ZMQ_ROUTER_HANDOVER: 56
 };
 
 Object.keys(longOptions).forEach(function(name){

windows/include/zmq.h

@@ -250,6 +250,7 @@ ZMQ_EXPORT int zmq_msg_set (zmq_msg_t *msg, int option, int optval);
 #define ZMQ_TCP_ACCEPT_FILTER 38
 #define ZMQ_DELAY_ATTACH_ON_CONNECT 39
 #define ZMQ_XPUB_VERBOSE 40
+#define ZMQ_ROUTER_HANDOVER 56
 
 
 /*  Message options                                                           */