message: Mention when to change `PING_TIMEOUT`
diff: @@ -129,6 +129,11 @@ const OUTGOING_MANAGER_SWEEP_INTERVAL: Duration = Duration::from_secs(1);
  const PING_INTERVAL: Duration = Duration::from_secs(30);
  /// Maximum time for a ping until it connections are severed.
  +///
  +/// If you are running a network under very extreme conditions, it may make sense to alter these
  +/// values, but usually these values should require no changing.
  +///
  +/// `PING_TIMEOUT` should be less than `PING_INTERVAL` at all times.
  const PING_TIMEOUT: Duration = Duration::from_secs(6);
  /// How many pings to send before giving up and dropping the connection.
  