status: LinkStatus removed

- new channels would have to be derived from a channel named 'LinkStatus'?
- not channels are not invoked by LifecycleManager (that was not an original design goal either)
IStatus removed: was unused

we can reintroduce something like that when need comes for it
MACs to use InterfaceEntry instead of separate interfaceStatus module
Radio: added new state RadioState::OFF, and use that instead of interface status
node operations renamed
compile fixes, etc