- removes the costTags option from router link listeners, which was parsed
from config, advertised to the controller, and stored on the router model
but never used for path selection or any other behavior
- drops GetLinkCostTags from the xlink.Listener interface and its transport
implementation
- reserves the corresponding ctrl_pb.Listener.costTags and
RouterLinks.RouterLink.linkCostTags protobuf fields and regenerates ctrl.pb.go
- documents the removal in the changelog
Paul Lorenz
a003f18792