authorized_keys_d: privatize SSHAuthorizedKeysDir members.
authorized_keys_d: privatize SSHAuthorizedKeysDir members.

marineam/update-ssh-keys,coreos/update-ssh-keys,stongo/update-ssh-keys,stongo/update-ssh-keys,marineam/update-ssh-keys,marineam/update-ssh-keys,stongo/update-ssh-keys,coreos/update-ssh-keys