- streamlining topology log messages
  added:
   --adjust-toml
   --display-l2-neighbours
   --include-l3-loopback
   --skip-l3-cidr-0
   --skip-l3-cidr-32-128
   --skip-l3-public
  fixed:
   --dont-compare
   --keep
  changed:
   L2_DROP_HOSTS -> L2_DROP_NEIGHBOURS
  removed:
   CUSTOM_LAYERS