copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

15 files changed, 41 insertions, 5 deletions

diff --git a/include/Makefile.am b/include/Makefile.am
index a334fdcae..32d7b339d 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -5,7 +5,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -18,6 +18,8 @@
 # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 # KIND, either express or implied.
 #
+# SPDX-License-Identifier: curl
+#
 ###########################################################################
 SUBDIRS = curl
 
diff --git a/include/README.md b/include/README.md
index bd28a30e8..8fdbe0e0e 100644
--- a/include/README.md
+++ b/include/README.md
@@ -1,3 +1,9 @@
+<!--
+Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+
+SPDX-License-Identifier: curl
+-->
+
 # include
 
 Public include files for libcurl, external users.
diff --git a/include/curl/.gitignore b/include/curl/.gitignore
index 555795fae..a856a0f96 100644
--- a/include/curl/.gitignore
+++ b/include/curl/.gitignore
@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 curlver.h.dist
 stamp-h2
 stamp-h3
diff --git a/include/curl/Makefile.am b/include/curl/Makefile.am
index cad2ace03..60e26526e 100644
--- a/include/curl/Makefile.am
+++ b/include/curl/Makefile.am
@@ -18,6 +18,8 @@
 # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 # KIND, either express or implied.
 #
+# SPDX-License-Identifier: curl
+#
 ###########################################################################
 pkginclude_HEADERS = \
   curl.h curlver.h easy.h mprintf.h stdcheaders.h multi.h \
diff --git a/include/curl/curl.h b/include/curl/curl.h
index 49595a261..61670ee51 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 /*
diff --git a/include/curl/curlver.h b/include/curl/curlver.h
index 568a2b775..a936eb410 100644
--- a/include/curl/curlver.h
+++ b/include/curl/curlver.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 /* This header file contains nothing but libcurl version info, generated by
diff --git a/include/curl/easy.h b/include/curl/easy.h
index 2dbfb26b5..9c7e63ada 100644
--- a/include/curl/easy.h
+++ b/include/curl/easy.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 #ifdef  __cplusplus
 extern "C" {
diff --git a/include/curl/header.h b/include/curl/header.h
index 7715b61e2..6af29c0c0 100644
--- a/include/curl/header.h
+++ b/include/curl/header.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 struct curl_header {
diff --git a/include/curl/mprintf.h b/include/curl/mprintf.h
index 3549552db..cb948dcd9 100644
--- a/include/curl/mprintf.h
+++ b/include/curl/mprintf.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 #include <stdarg.h>
diff --git a/include/curl/multi.h b/include/curl/multi.h
index 362eabc7f..30104925b 100644
--- a/include/curl/multi.h
+++ b/include/curl/multi.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 /*
   This is an "external" header file. Don't give away any internals here!
diff --git a/include/curl/options.h b/include/curl/options.h
index 91360b358..c8ac827c0 100644
--- a/include/curl/options.h
+++ b/include/curl/options.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 #ifdef  __cplusplus
diff --git a/include/curl/stdcheaders.h b/include/curl/stdcheaders.h
index 60596c756..82e1b5fef 100644
--- a/include/curl/stdcheaders.h
+++ b/include/curl/stdcheaders.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 #include <sys/types.h>
diff --git a/include/curl/system.h b/include/curl/system.h
index 000fea6c7..8d56b8a4a 100644
--- a/include/curl/system.h
+++ b/include/curl/system.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 /*
diff --git a/include/curl/typecheck-gcc.h b/include/curl/typecheck-gcc.h
index 43a920104..d7c7a9a30 100644
--- a/include/curl/typecheck-gcc.h
+++ b/include/curl/typecheck-gcc.h
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 /* wraps curl_easy_setopt() with typechecking */
diff --git a/include/curl/urlapi.h b/include/curl/urlapi.h
index a475f91b6..e15c213cc 100644
--- a/include/curl/urlapi.h
+++ b/include/curl/urlapi.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 2018 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2018 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -20,6 +20,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  ***************************************************************************/
 
 #include "curl.h"