message: Rename `is_caught_up()` to `is_stalled()`
diff: @@ -199,7 +199,7 @@ impl BlockAccumulator {
  return SyncInstruction::BlockSync { block_hash };
  }
  None => {
  - if self.is_caught_up() {
  + if !self.is_stalled() {
  return SyncInstruction::CaughtUp { block_hash };
  }
  }
  @@ -517,7 +517,7 @@ impl BlockAccumulator {
  .map(|acceptor| acceptor.peers().iter().cloned().collect())
  }
  - fn is_caught_up(&mut self) -> bool {
  + fn is_stalled(&mut self) -> bool {
  // we expect to be receiving gossiped blocks from other nodes
  // if we haven't received any messages describing higher blocks
  // for more than the self.dead_air_interval config allows
  @@ -525,9 +525,9 @@ impl BlockAccumulator {
  if self.last_progress.elapsed() >= self.dead_air_interval {
  // we don't want to swamp the network with "are we there yet" leaps.
  self.last_progress = Timestamp::now();
  - false
  - } else {
  true
  + } else {
  + false
  }
  }
  