message: Update copyright on new file
  Summary: as in title
diff: -// (c) Facebook, Inc. and its affiliates. Confidential and proprietary.
  +/*
  + * Copyright (c) Facebook, Inc. and its affiliates.
  + *
  + * This source code is licensed under the MIT license found in the
  + * LICENSE file in the root directory of this source tree.
  + *
  + */
  #include <quic/common/TransportKnobs.h>
  #include <folly/portability/GTest.h>
  