The `logo` symbolic link under `certs` serves as a more convenient path
for the certificates in the `.certs` submodule. Roles can refer to
certificates using this path instead of the submodule directly.
The *certs* repository contains certificates issued by Let's Encrypt
automatically using Lego. A Jenkins job runs daily to renew these
certificates as needed, and commit updated certificate files to the
repository.
To deploy these certificates to the applications that use them,
jobs will need to be scheduled to apply configuration policy for those
applications regularly. Using symlinks to the files in this submodule,
Ansible can deploy those files whenever they change.
Since the same certificate is used for LDAPS and RADIUS (EAP-TLS), it
makes more sense to store it only once, with the later file as a symlink
to the former.
Dustin