fix "fix "caddy-frontend: Publish only active slaves from main partition""

Unfortunately slave_title was put by mistake, it supposed to be slave_reference.

software/caddy-frontend/buildout.hash.cfg

@@ -26,7 +26,7 @@ md5sum = 6fd023f0d29421d8579f0b3351473bb0
 
 [template-apache-replicate]
 filename = instance-apache-replicate.cfg.in
-md5sum = c9d667f8491d2efe41acc4dbd3b78b87
+md5sum = 5c5462ccc327fe109e0c102f0d3e7e53
 
 [template-slave-list]
 filename = templates/apache-custom-slave-list.cfg.in

software/caddy-frontend/instance-apache-replicate.cfg.in

@@ -228,7 +228,7 @@ custom-group = ${dynamic-publish-slave-information:rendered}
 {% for slave_instance in slave_instance_list %}
 {# Provide a list of slave titles send by master, in order to filter out already destroyed slaves #}
 {# Note: This functionality is not yet covered by tests, please modify with care #}
-{%   do active_slave_instance_list.append(slave_instance['slave_title']) %}
+{%   do active_slave_instance_list.append(slave_instance['slave_reference']) %}
 {% endfor %}
 active-slave-instance-list = {{ json_module.dumps(active_slave_instance_list) }}