* gossip: do not issue a connection request if we are not a validator
* guide updates
* use all relevant authorities when issuing a request
* use AuthorityDiscoveryApi instead
* update comments to the status quo
* add number to `ActivatedLeavesUpdate`
* update subsystem util and overseer
* use new ActivatedLeaf everywhere
* sort view
* sorted and limited view in network bridge
* use live block hash only if it's newer
* grumples