In order to more flexibly handle SSH keys, the variables barman_ssh_public_key_path, barman_ssh_private_key_path and barman_authorized_keys_path have been replaced with barman_ssh_public_key, barman_ssh_private_key and barman_authorized_keys. The first two variables now should be assigned the values of the keys directly, and the third should be given a list of ssh-keys to be added to the user's authorized_keys file.