Add copyright statement and MIT license to more bash scripts

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/obscureorganization/obscure-scripts?shareId=XXXX-XXXX-XXXX-XXXX).

Author: obscurerichard

cert-notifier.sh

@@ -5,6 +5,10 @@
 # restart those subsystems.
 # 
 # Configure this in /etc/sysconfig/certbot
+#
+# Copyright (C) 2022 The Obscure Organization
+#
+# MIT licensed. See the LICENSE file for details.
 
 # Set unofficial bash strict mode http://redsymbol.net/articles/unofficial-bash-strict-mode/
 set -euo pipefail

mail-symlink-inbox.sh

@@ -1,5 +1,10 @@
 #!/usr/bin/env bash
 # mail-symlink-inbox.sh
+#
+# Copyright (C) 2022 The Obscure Organization
+#
+# MIT licensed. See the LICENSE file for details.
+
 set -euo pipefail
 
 DEBUG=${DEBUG:-false}