kernel - Major bridging functionality added (bug fixes)
* The root bridge was not taking into account the peer's weightings when
calculating path costs.
In order to do this the root bridge must use available peer info. The
peer info should already include both the local and remote's path costs
since 'we' are the root, so our path cost will already be directly
incorporated in the path cost the peer reports to us.
* Fixes issue where not-weighted path costs on root bridge were not
synchronized with the weighted path costs of one or more of its peers.