- Add a mechanism to limit the rate at which gateway is publishing on the broker.
- It is disabled by default and can be enabled with option --mqtt_rate_limit_pps (or with global variable WM_SERVICES_MQTT_RATE_LIMIT_PPS)
- Add a backoff mechanism to randomize the interval to reconnect to broker
- It is useful to avoid all gateways reconnecting at same time in case broker is down