[SOLVED] MQTT 2.x inbound command

First, please use code fences, thanks

Bridge mqtt:broker:myUnsecureBroker [ host="192.168.0.42", secure=false ]
{
    Thing topic mything {
    Channels:
        Type string : alarmpanel "Alarm system" [ stateTopic="alarm/panel/state", commandTopic="alarm/panel/set" ]
}
}

Yes:
Type string : alarmpanel "Alarm system" [ stateTopic="alarm/panel/state", commandTopic="alarm/panel/set", postCommand="true" ]

PS: This is not yet documented in: https://www.openhab.org/addons/bindings/mqtt.generic/ but I have just submitted a PR to add it.