[OASIS Issue Tracker] Created: (MQTT-5) Should the unused DUP, QoS, and RETAIN flags be zero in the CONNECT message?

Should the unused DUP, QoS, and RETAIN flags be zero in the CONNECT message?
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                 Key: MQTT-5
                 URL: http://tools.oasis-open.org/issues/browse/MQTT-5
             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
          Issue Type: Improvement
            Reporter: Andrew Banks


Should the unused DUP, QoS, and RETAIN flags be zero in the MQTT Connect message? The current mqtt.org specification leaves this open. By 
specifying that they must be zero we make it possible to put them to some use in the future.

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