Log: show the matching rule tag (#3809)

app/router/command/config.go

@@ -28,6 +28,10 @@ func (c routingContext) GetTargetPort() net.Port {
 	return net.Port(c.RoutingContext.GetTargetPort())
 }
 
+func (c routingContext) GetRuleTag() string {
+	return ""
+}
+
 // GetSkipDNSResolve is a mock implementation here to match the interface,
 // SkipDNSResolve is set from dns module, no use if coming from a protobuf object?
 // TODO: please confirm @Vigilans