Merge changes Icc40d3d8,I241bcf4e,I9406eb11,I8dea0a13,Ib4a05164, ...

* changes:
  rusty-gd: update visibilities, put parse & to bytes on pub api
  rusty-gd: refine specialization
  rusty-gd: start specialzation frontend
  rusty-gd: add packet accessors
  rusty-gd: Add child & into for pub access packet structs
  rusty-gd: separate data storage from packet view