Previously this field contained the device name, too. This would make it
necessary for drivers to remove the device part of the name when SetValue
is called. Instead the device name is now always provided by the driver in
the appropriate field DeviceNameForDriver.
We will now have a broker (aqhome-data) which stores data and distributes
value change messages among connected clients.
aqhomed will connect to that broker and send its values there.
aqhome-mqtt will also connect to the broker and send its values there.
Other clients can later connect to check for changes and react according
to rules.
