Implement caching dns resolver

mtglib/init.go

@@ -35,12 +35,10 @@ type Network interface {
 
 type AntiReplayCache interface {
 	SeenBefore(data []byte) bool
-	Shutdown()
 }
 
 type IPBlocklist interface {
 	Contains(net.IP) bool
-	Shutdown()
 }
 
 type Event interface {
@@ -50,7 +48,6 @@ type Event interface {
 
 type EventStream interface {
 	Send(context.Context, Event)
-	Shutdown()
 }
 
 type TimeAttackDetector interface {