* All copyright lines now have -2020 instead of -present
* All copyright lines include "Facebook, Inc"
* All licenses are now standardized
The copyright in `threading.{h,c}` is not changed because it comes from
zstdmt.
The copyright and license of `divsufsort.{h,c}` is not changed.
Previously,
followed by :
would fail to include the static definitions,
because the second include was simply skipped by guard macro.
Now it works as intended :
the missing static part is included during the second include.
