am 1750e12b: am ad21a1f6: (-s ours) Merge "Revert "DO NOT MERGE: Add generic IP packet code and use it for GRE."" into klp-dev

* commit '1750e12b7d5a9ce9fd916130cd11a4ddf0c0237d':
  Revert "DO NOT MERGE: Add generic IP packet code and use it for GRE."