message: build and run HTTP/3 tests
  Summary:
  This also builds and run the existing HTTP tests with CMake.
  Getting ready for deprecating the autoconf build
  (Note: this ignores all push blocking failures!)
diff: # This source code is licensed under the MIT license found in the
  # LICENSE file in the root directory of this source tree.
  +# Always install this header, even when not building tests.
  +# It can be used by dependent projects to build their own tests
  +install(FILES MockQuicSocket.h DESTINATION include/quic/api/test)
  +
  if(NOT BUILD_TESTS)
  return()
  endif()
  