message: Comment on persistent congestion being AppData space only
  Summary: Just a comment change
diff: @@ -31,9 +31,10 @@ std::chrono::microseconds calculatePTO(const QuicConnectionStateBase& conn);
  /**
  * Whether conn is having persistent congestion.
  *
  - * TODO: This currently doesn't check if packets within this window from other
  - * pnSpace are lost too.
  - * Pending https://github.com/quicwg/base-drafts/issues/2649
  + * Persistent congestion requires a time period much longer than crypto timer.
  + * This means no handshake packet should be in a persistent congestion range.
  + * Thus persistent congestion is per pnSpace, and it's AppData space only.
  + *
  */
  bool isPersistentCongestion(
  const QuicConnectionStateBase& conn,
  