spdx: initial adoption of licensing ID tags.

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.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133

15 files changed, 30 insertions, 0 deletions

diff --git a/sys/dev/mii/amphy.c b/sys/dev/mii/amphy.c
index ae3827db9a22..bd6b75e2b2b0 100644
--- a/sys/dev/mii/amphy.c
+++ b/sys/dev/mii/amphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1997, 1998, 1999
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/amphyreg.h b/sys/dev/mii/amphyreg.h
index 6cdbc95647b5..30bac3028b05 100644
--- a/sys/dev/mii/amphyreg.h
+++ b/sys/dev/mii/amphyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1997, 1998, 1999
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/brgphy.c b/sys/dev/mii/brgphy.c
index eea3588f7038..6d77b11a1e7a 100644
--- a/sys/dev/mii/brgphy.c
+++ b/sys/dev/mii/brgphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2000
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/brgphyreg.h b/sys/dev/mii/brgphyreg.h
index b3535d59fbc2..5cceb392a02b 100644
--- a/sys/dev/mii/brgphyreg.h
+++ b/sys/dev/mii/brgphyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2000
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/ciphy.c b/sys/dev/mii/ciphy.c
index 2d2816cddf0a..b91b19f8c89a 100644
--- a/sys/dev/mii/ciphy.c
+++ b/sys/dev/mii/ciphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2004
  *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
  *
diff --git a/sys/dev/mii/ciphyreg.h b/sys/dev/mii/ciphyreg.h
index dd73f87783dc..ce91db480ada 100644
--- a/sys/dev/mii/ciphyreg.h
+++ b/sys/dev/mii/ciphyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2004
  *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
  *
diff --git a/sys/dev/mii/mlphy.c b/sys/dev/mii/mlphy.c
index 89b4f2cc0b48..486a2fa0241d 100644
--- a/sys/dev/mii/mlphy.c
+++ b/sys/dev/mii/mlphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1997, 1998, 1999
  *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/nsgphyreg.h b/sys/dev/mii/nsgphyreg.h
index 44899191715e..02dff78b97c8 100644
--- a/sys/dev/mii/nsgphyreg.h
+++ b/sys/dev/mii/nsgphyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2001 Wind River Systems
  * Copyright (c) 2001
  *	Bill Paul <wpaul@bsdi.com>.  All rights reserved.
diff --git a/sys/dev/mii/pnaphy.c b/sys/dev/mii/pnaphy.c
index 6e5c51b255cf..c03c57844985 100644
--- a/sys/dev/mii/pnaphy.c
+++ b/sys/dev/mii/pnaphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2000 Berkeley Software Design, Inc.
  * Copyright (c) 1997, 1998, 1999, 2000
  *	Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
diff --git a/sys/dev/mii/rgephy.c b/sys/dev/mii/rgephy.c
index 25cea3abdbaf..362aa200cba0 100644
--- a/sys/dev/mii/rgephy.c
+++ b/sys/dev/mii/rgephy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2003
  *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
  *
diff --git a/sys/dev/mii/rgephyreg.h b/sys/dev/mii/rgephyreg.h
index 35917daa69c9..39efaee4ddd0 100644
--- a/sys/dev/mii/rgephyreg.h
+++ b/sys/dev/mii/rgephyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2003
  *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
  *
diff --git a/sys/dev/mii/rlphy.c b/sys/dev/mii/rlphy.c
index 782fc3c807b5..6433faf23142 100644
--- a/sys/dev/mii/rlphy.c
+++ b/sys/dev/mii/rlphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1997, 1998, 1999
  *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/rlswitch.c b/sys/dev/mii/rlswitch.c
index d3e3c938df7e..e21797a4c9a6 100644
--- a/sys/dev/mii/rlswitch.c
+++ b/sys/dev/mii/rlswitch.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1997, 1998, 1999
  *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
  * Copyright (c) 2006 Bernd Walter.  All rights reserved.
diff --git a/sys/dev/mii/xmphy.c b/sys/dev/mii/xmphy.c
index 8c35aa5cf749..c0c67e4d19e5 100644
--- a/sys/dev/mii/xmphy.c
+++ b/sys/dev/mii/xmphy.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2000
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *
diff --git a/sys/dev/mii/xmphyreg.h b/sys/dev/mii/xmphyreg.h
index 92b9f78b4617..30877233ff34 100644
--- a/sys/dev/mii/xmphyreg.h
+++ b/sys/dev/mii/xmphyreg.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 2000
  *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
  *