ed: Add SPDX-License-Identifier tags

Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D55208

bin/ed/buf.c

@@ -1,6 +1,8 @@
 /* buf.c: This file contains the scratch-file buffer routines for the
    ed line editor. */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/ed.h

@@ -1,5 +1,7 @@
 /* ed.h: type and constant definitions for the ed editor. */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore
  * All rights reserved.
  *

bin/ed/glbl.c

@@ -1,6 +1,8 @@
 /* glob.c: This file contains the global command routines for the ed line
    editor */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/io.c

@@ -1,5 +1,7 @@
 /* io.c: This file contains the i/o routines for the ed line editor */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/main.c

@@ -1,6 +1,8 @@
 /* main.c: This file contains the main control and user-interface routines
    for the ed line editor. */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/re.c

@@ -1,6 +1,8 @@
 /* re.c: This file contains the regular expression interface routines for
    the ed line editor. */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/sub.c

@@ -1,6 +1,8 @@
 /* sub.c: This file contains the substitution routines for the ed
    line editor */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *

bin/ed/undo.c

@@ -1,5 +1,7 @@
 /* undo.c: This file contains the undo routines for the ed line editor */
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 1993 Andrew Moore, Talke Studio.
  * All rights reserved.
  *