message: DstConnId Usage
  Summary: - small code clean-up for consistency
diff: @@ -836,11 +836,10 @@ void QuicClientTransport::onReadData(
  void QuicClientTransport::writeData() {
  QuicVersion version = conn_->version.value_or(*conn_->originalVersion);
  const ConnectionId& srcConnId = *conn_->clientConnectionId;
  - const ConnectionId* destConnId =
  - &(*clientConn_->initialDestinationConnectionId);
  - if (conn_->serverConnectionId) {
  - destConnId = &(*conn_->serverConnectionId);
  - }
  + const ConnectionId& destConnId = conn_->serverConnectionId
  + ? *conn_->serverConnectionId
  + : *clientConn_->initialDestinationConnectionId;
  +
  if (closeState_ == CloseState::CLOSED) {
  auto rtt = clientConn_->lossState.srtt == 0us
  ? clientConn_->transportSettings.initialRtt
  @@ -857,7 +856,7 @@ void QuicClientTransport::writeData() {
  writeShortClose(
  *socket_,
  *conn_,
  - *destConnId,
  + destConnId,
  conn_->localConnectionError,
  *conn_->oneRttWriteCipher,
  *conn_->oneRttWriteHeaderCipher);
  @@ -868,7 +867,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId,
  - *destConnId,
  + destConnId,
  LongHeader::Types::Handshake,
  conn_->localConnectionError,
  *conn_->handshakeWriteCipher,
  @@ -881,7 +880,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId,
  - *destConnId,
  + destConnId,
  LongHeader::Types::Initial,
  conn_->localConnectionError,
  *conn_->initialWriteCipher,
  @@ -920,7 +919,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId /* src */,
  - *destConnId /* dst */,
  + destConnId /* dst */,
  LongHeader::Types::Initial,
  *conn_->initialWriteCipher,
  *conn_->initialHeaderCipher,
  @@ -950,7 +949,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId /* src */,
  - *destConnId /* dst */,
  + destConnId /* dst */,
  LongHeader::Types::Handshake,
  *conn_->handshakeWriteCipher,
  *conn_->handshakeWriteHeaderCipher,
  @@ -968,7 +967,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId /* src */,
  - *destConnId /* dst */,
  + destConnId /* dst */,
  *clientConn_->zeroRttWriteCipher,
  *clientConn_->zeroRttWriteHeaderCipher,
  version,
  @@ -983,7 +982,7 @@ void QuicClientTransport::writeData() {
  *socket_,
  *conn_,
  srcConnId,
  - *destConnId,
  + destConnId,
  *conn_->oneRttWriteCipher,
  *conn_->oneRttWriteHeaderCipher,
  version,
  