Add a University of California/Unix copyright statement that commonly precedes the BSD-3 license
PiperOrigin-RevId: 433306105
diff --git a/v2/assets/Supplement/BSD-3-Clause/uc-unix.txt b/v2/assets/Supplement/BSD-3-Clause/uc-unix.txt
new file mode 100644
index 0000000..ab2e905
--- /dev/null
+++ b/v2/assets/Supplement/BSD-3-Clause/uc-unix.txt
@@ -0,0 +1,10 @@
+Copyright (c) 1991, 1993
+ The Regents of the University of California. All rights reserved.
+(c) UNIX System Laboratories, Inc.
+All or some portions of this file are derived from material licensed
+to the University of California by American Telephone and Telegraph
+Co. or Unix System Laboratories, Inc. and are reproduced herein with
+the permission of UNIX System Laboratories, Inc.
+
+This code is derived from software contributed to Berkeley by
+Hugh Smith at The University of Guelph.
