300 bytes, as well as cleaner protocol logic.
* Made parent management uniform.
* Simplified the DIO processing.
* Improved the Objective Function API and its documentation.
* Removed redundant code at various places.
* Improved identifier naming.
* Switched visualization from candidate parents to preferred parents only.
* Made DAO ACK transmissions configurable.
* Improved initial ETX guess by using a cached local confidence value.
* Added a periodical rank recalculation function to reduce
the maximum stack depth.
* Increased the Trickle redundancy constant to ensure faster
topological updates.
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