message: send reset instead of silently dropping packets due to misrouting
  Summary:
  There were some TODOs left in the QuicServerWorker where we silently drop
  packets.
diff: @@ -414,11 +414,13 @@ void QuicServerWorker::forwardNetworkData(
  "Dropping packet due to unknown connectionId version, routingInfo={}",
  logRoutingInfo(routingData.destinationConnId));
  QUIC_STATS(
  - statsCallback_,
  - onPacketDropped,
  - PacketDropReason::CONNECTION_NOT_FOUND);
  + statsCallback_, onPacketDropped, PacketDropReason::PARSE_ERROR);
  + return sendResetPacket(
  + routingData.headerForm,
  + client,
  + networkData,
  + routingData.destinationConnId);
  }
  - return;
  }
  bool userSpacePktRoute;
  @@ -438,7 +440,11 @@ void QuicServerWorker::forwardNetworkData(
  logRoutingInfo(routingData.destinationConnId));
  QUIC_STATS(
  statsCallback_, onPacketDropped, PacketDropReason::PARSE_ERROR);
  - return;
  + return sendResetPacket(
  + routingData.headerForm,
  + client,
  + networkData,
  + routingData.destinationConnId);
  }
  if (LIKELY(connIdParam->workerId == workerId_)) {
  userSpacePktRoute = false;
  @@ -601,14 +607,20 @@ void QuicServerWorker::dispatchPacketData(
  statsCallback_,
  onPacketDropped,
  PacketDropReason::CANNOT_MAKE_TRANSPORT);
  + // TODO reevaluate sending stateless reset here. At this state, the peer
  + // will not have received the token yet. So these reset packets will just
  + // be dropped by the peer.
  return;
  }
  if (!connIdAlgo_->canParse(routingData.destinationConnId)) {
  VLOG(3) << "Dropping packet with bad DCID, routingInfo="
  << logRoutingInfo(routingData.destinationConnId);
  QUIC_STATS(statsCallback_, onPacketDropped, PacketDropReason::PARSE_ERROR);
  - // TODO do we need to reset?
  - return;
  + return sendResetPacket(
  + routingData.headerForm,
  + client,
  + networkData,
  + routingData.destinationConnId);
  }
  auto connIdParam =
  connIdAlgo_->parseConnectionId(routingData.destinationConnId);
  @@ -619,8 +631,11 @@ void QuicServerWorker::dispatchPacketData(
  folly::to<std::string>(connIdParam.error().errorCode()),
  logRoutingInfo(routingData.destinationConnId));
  QUIC_STATS(statsCallback_, onPacketDropped, PacketDropReason::PARSE_ERROR);
  - // TODO do we need to reset?
  - return;
  + return sendResetPacket(
  + routingData.headerForm,
  + client,
  + networkData,
  + routingData.destinationConnId);
  }
  if (connIdParam->hostId != hostId_) {
  VLOG(3) << "Dropping packet routed to wrong host, routingInfo="
  