message: Bump the acceptable drift to 1 minute.
diff: @@ -283,7 +283,8 @@ impl<I: Clone + PartialEq + 'static> LinearChainSync<I> {
  /// Returns whether `block` can be considered tip of the chain.
  fn is_chain_end(&self, block: &Block) -> bool {
  - let acceptable_drift_millis = 5000;
  + // 1 minute.
  + let acceptable_drift_millis = 60 * 1000;
  block.header().timestamp().elapsed().millis() <= acceptable_drift_millis
  }
  