root_ssh: Add variable to define additional keys

Introduce "root_additional_keys" variable allowing us to deploy
additional root keys with our "root_ssh" role

Signed-off-by: moson <moson@archlinux.org>

roles/root_ssh/templates/authorized_keys.j2

@@ -9,3 +9,8 @@
 		{% endif %}
 	{% endif %}
 {% endfor %}
+{% if root_additional_keys is defined %}
+	{% for pubkey in root_additional_keys -%}
+		{{ lookup('file', role_path + '/../../pubkeys/' + pubkey ) }}
+	{% endfor %}
+{% endif %}