These roles are very similar and can be merged into a single new role.
Note: The archive mirror is changed from a 4-hour sync to minutely for
conformity with the other two mirrors. In practice this doesn't matter
as it was already taking over 4 hours to finish and was starting again
right after its previous run.
These are used to signal the start of the document in a stream of many
documents. As Ansible only supports one YAML document per file this is
unnecessary. About a third of our YAML documents already lacked these.
