Hardware fingerprint

[xtrojak]

The trusted devices will be recognized using fingerprint of the hardware (with additional information such as MAC address). It is necessary to define a reliable approach how to implement such a feature.

[JanCervenyy]

fingeprinting designed, but low priority for implementation for now. Using generic fingerprint for all devices is now temporary solution and once all essential functionalities are working as production release the issue is active again.