message: Initialize round success meter with current timestamp.
  Initializing it with the era start time makes it likely to
  unnecessarily slow down after downtime, because it will count all rounds
  since the era's beginning as "failed".
diff: @@ -147,7 +147,7 @@ impl<I: NodeIdT, C: Context + 'static> HighwayProtocol<I, C> {
  highway_config.minimum_round_exponent,
  highway_config.minimum_round_exponent,
  highway_config.maximum_round_exponent,
  - era_start_time,
  + now,
  config.into(),
  )
  });
  