Evict inactive peers from the collator protocol peer-set (#2680)

* malicious reputation cost is fatal

* make ReportBad a malicious cost

* futures control-flow for cleaning up inactive collator peers

* guide: network bridge updates

* add `PeerDisconnected` message

* guide: update

* reverse order

* remember to match

* implement disconnect peer in network bridge

* implement disconnect_inactive_peers

* test

* remove println

* don't hardcore policy

* add fuse outside of loop

* use default eviction policy

polkadot/node/service/src/lib.rs

@@ -503,7 +503,7 @@ where
 		collator_protocol: {
 			let side = match is_collator {
 				IsCollator::Yes(id) => ProtocolSide::Collator(id, Metrics::register(registry)?),
-				IsCollator::No => ProtocolSide::Validator(Metrics::register(registry)?),
+				IsCollator::No => ProtocolSide::Validator(Default::default(),Metrics::register(registry)?),
 			};
 			CollatorProtocolSubsystem::new(
 				side,