Problem: ZMQ_BINDTODEVICE has met STABLE conditions

Solution: move them from DRAFT to STABLE since it's been in a public
release, committed for 6+ months and has not changed.

NEWS

@@ -11,6 +11,10 @@
     - ZMQ_GSSAPI_NT_USER_NAME
     - ZMQ_GSSAPI_NT_KRB5_PRINCIPAL
     See doc/zmq_gssapi.txt for details.
+  - ZMQ_BINDTODEVICE socket option (Linux only), which will bind the
+    socket(s) to the specified interface. Allows to use Linux VRF, see:
+    https://www.kernel.org/doc/Documentation/networking/vrf.txt
+    NOTE: requires the program to be ran as root OR with CAP_NET_RAW
 
 
 0MQ version 4.2.4 stable, released on 2018/03/21

include/zmq.h

@@ -375,6 +375,7 @@ ZMQ_EXPORT const char *zmq_msg_gets (const zmq_msg_t *msg,
 #define ZMQ_USE_FD 89
 #define ZMQ_GSSAPI_PRINCIPAL_NAMETYPE 90
 #define ZMQ_GSSAPI_SERVICE_PRINCIPAL_NAMETYPE 91
+#define ZMQ_BINDTODEVICE 92
 
 /*  Message options                                                           */
 #define ZMQ_MORE 1
@@ -592,7 +593,6 @@ ZMQ_EXPORT void zmq_threadclose (void *thread);
 #define ZMQ_DGRAM 18
 
 /*  DRAFT Socket options.                                                     */
-#define ZMQ_BINDTODEVICE 92
 #define ZMQ_ZAP_ENFORCE_DOMAIN 93
 #define ZMQ_LOOPBACK_FASTPATH 94
 #define ZMQ_METADATA 95

src/zmq_draft.h

@@ -51,7 +51,6 @@ unsigned long zmq_stopwatch_intermediate (void *watch_);
 #define ZMQ_DGRAM 18
 
 /*  DRAFT Socket options.                                                     */
-#define ZMQ_BINDTODEVICE 92
 #define ZMQ_ZAP_ENFORCE_DOMAIN 93
 #define ZMQ_LOOPBACK_FASTPATH 94
 #define ZMQ_METADATA 95