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

.github/workflows/bearssl.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/codeql-analysis.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: CodeQL
 
 on:

.github/workflows/event-based.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/fuzz.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Fuzzer
 
 on:

.github/workflows/hacktoberfest-accepted.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Hacktoberfest
 
 on:

.github/workflows/linkcheck.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Markdown links
 
 on:

.github/workflows/linux-hyper.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/macos.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: macOS
 
 on:

.github/workflows/mbedtls.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/msh3.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/nss.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/openssl3.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/reuse.yml

@@ -0,0 +1,25 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+# SPDX-FileCopyrightText: 2022 Free Software Foundation Europe e.V. <https://fsfe.org>
+#
+# SPDX-License-Identifier: curl
+
+name: REUSE Compliance Check
+
+on:
+  # Trigger the workflow on push or pull requests, but only for the
+  # master branch
+  push:
+    branches:
+    - master
+    - '*/ci'
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: REUSE Compliance Check
+      uses: fsfe/reuse-action@v1

.github/workflows/rustls.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on:

.github/workflows/wolfssl.yml

@@ -1,3 +1,7 @@
+# Copyright (C) 2000 - 2022 Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+
 name: Linux
 
 on: