Fix copyright and license lines
* 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.
diff --git a/lib/common/threading.c b/lib/common/threading.c
index 482664b..e2edb31 100644
--- a/lib/common/threading.c
+++ b/lib/common/threading.c
@@ -2,12 +2,13 @@
* Copyright (c) 2016 Tino Reichardt
* All rights reserved.
*
+ * You can contact the author at:
+ * - zstdmt source repository: https://github.com/mcmilk/zstdmt
+ *
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
- *
- * You can contact the author at:
- * - zstdmt source repository: https://github.com/mcmilk/zstdmt
+ * You may select, at your option, one of the above-listed licenses.
*/
/**