Please clarify the license of boost/chrono/io/time_point_io.hpp

[jwakely]

https://github.com/boostorg/chrono/blob/develop/include/boost/chrono/io/time_point_io.hpp says it's covered by three licenses, and for two of them it says "See LICENSE.TXT for details." There is no such file in the repo.

[jwakely]

https://github.com/boostorg/chrono/blob/develop/include/boost/chrono/detail/scan_keyword.hpp has the same license info.