o Code simplifications and refactoring:
    - Remove some dead code as indicated by coverity.
    - Remove a few dead assignments during router parsing. Found by coverity.
  o Minor bugfixes:
    - Add some forgotten return value checks during unit tests. Found
      by coverity.
    - Don't use 1-bit wide signed bit fields. Found by coverity.
    - Fix a rare memory leak during stats writing. Found by coverity.