Add remaining SPDX License information (#97)

* Add SPDX License information

Adding license information according to the SPDX stanard.
Used the reuse tool.
Bug: #95

* Add SPDX license information to remaining files

- converted AUTHORS to markdown
- added FSFUL license INSTALL.license as it is named in the header of INSTALL

- added SPDX license information for some files such as insignificant-files
  and uncopyrightable files.
  used GPL-2-or-later where possible, because this was the former
  statement of the project and in order to minimize the number of licenses
  used.
  See also https://reuse.software/faq/#uncopyrightable
  and https://reuse.software/tutorial/#insignificant-files

Author: jonasstein

AUTHORS

@@ -0,0 +1,15 @@
+<!--
+SPDX-FileCopyrightText: 2022 stenc authors
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+stenc AUTHORS
+=============
+
+The authors of stenc are
+
+* John Coleman <[email protected]>
+* Samuel Martinez Jr. <[email protected]>
+* Jonas Stein <[email protected]>
+* James Wilson <[email protected]>

AUTHORS.md

@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2022 stenc authors
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 The Stenc team is looking forward to your contribution.
 Please prepare a pull request, or send us your `.patch` file
 Leave also a note, how you have tested the code. 

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2022 stenc authors
+
+SPDX-License-Identifier: GPL-2.0-or-later

ChangeLog.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 1994 Free Software Foundation, Inc.
+
+SPDX-License-Identifier: FSFUL

INSTALL.license

@@ -0,0 +1,3 @@
+Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
+
+This configure script is free software; the Free Software Foundation gives unlimited permission to copy, distribute and modify it.

LICENSES/FSFUL.txt

@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2022 stenc authors
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/scsitape/stenc.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/scsitape/stenc/alerts/)
 [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/scsitape/stenc.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/scsitape/stenc/context:cpp)
 [![REUSE status](https://api.reuse.software/badge/github.com/scsitape/stenc/)](https://api.reuse.software/info/github.com/scsitape/stenc/)

README.md

@@ -1,3 +1,7 @@
+.. SPDX-FileCopyrightText: 2022 stenc authors
+..
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
 =================================
 STENC(1) |General Commands Manual
 =================================

man/stenc.rst

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2022 stenc authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 Name:           stenc
 Version:        1.1.1
 Release:        3%{?dist}