Don't advertise shared subs as unavailable any more.

src/send_connack.c

@@ -60,13 +60,6 @@ int send__connack(struct mosquitto_db *db, struct mosquitto *context, int ack, i
 			}
 		}
 
-		/* FIXME - disable support until available */
-		rc = mosquitto_property_add_byte(&connack_props, MQTT_PROP_SHARED_SUB_AVAILABLE, 0);
-		if(rc){
-			mosquitto_property_free_all(&connack_props);
-			return rc;
-		}
-
 		proplen = property__get_length_all(connack_props);
 		varbytes = packet__varint_bytes(proplen);
 		remaining_length += proplen + varbytes;

test/mosq_test.py

@@ -389,7 +389,6 @@ def gen_connect(client_id, clean_session=True, keepalive=60, username=None, pass
 
 def gen_connack(flags=0, rc=0, proto_ver=4, properties=""):
     if proto_ver == 5:
-        properties += mqtt5_props.gen_byte_prop(mqtt5_props.PROP_SHARED_SUB_AVAILABLE, 0)
         properties = mqtt5_props.prop_finalise(properties)
 
         packet = struct.pack('!BBBB', 32, 2+len(properties), flags, rc) + properties