General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

3 files changed, 6 insertions, 0 deletions

diff --git a/bin/date/date.c b/bin/date/date.c
index 7f2e1b28a64c..089b392c22ed 100644
--- a/bin/date/date.c
+++ b/bin/date/date.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1985, 1987, 1988, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/date/extern.h b/bin/date/extern.h
index 9132663f59ad..509f77e95fd3 100644
--- a/bin/date/extern.h
+++ b/bin/date/extern.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/date/netdate.c b/bin/date/netdate.c
index d10801947cb4..ab16951e85ac 100644
--- a/bin/date/netdate.c
+++ b/bin/date/netdate.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  *