Add role for deploying SSH config and also add mailserver-endpoint host

playbooks/roles/deploy_ssh_server_config/README.md

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+# Role `deploy_ssh_server_config`
+
+This role deploys an SSH server config on the specified hosts.
+
+## `hosts`
+
+The `hosts` for this role need to be the machines, for which you want to deploy an SSH server config.
+
+## Required Variables
+
+This role doesn't have nay required variables.
+
+## Links & Resources
+
+- <https://infosec.mozilla.org/guidelines/openssh>
+- Also see [Debian 11 cloud 2023-04-21 default /etc/ssh/sshd_config](docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config).