Add a `matrix_synapse_redis_use_tls` variable

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/4113

roles/custom/matrix-synapse/defaults/main.yml

@@ -1145,6 +1145,7 @@ matrix_synapse_redis_host: ""
 matrix_synapse_redis_port: 6379
 matrix_synapse_redis_password: ""
 matrix_synapse_redis_dbid: 0
+matrix_synapse_redis_use_tls: false
 
 # Controls whether Synapse starts a replication listener necessary for workers.
 #

roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -2919,20 +2919,23 @@ media_instance_running_background_jobs: {{ matrix_synapse_media_instance_running
 redis:
   # Uncomment the below to enable Redis support.
   #
-  enabled: {{ matrix_synapse_redis_enabled }}
+  enabled: {{ matrix_synapse_redis_enabled | to_json }}
 
   # Optional host and port to use to connect to redis. Defaults to
   # localhost and 6379
   #
-  host: {{ matrix_synapse_redis_host }}
-  port: {{ matrix_synapse_redis_port }}
+  host: {{ matrix_synapse_redis_host | to_json }}
+  port: {{ matrix_synapse_redis_port | to_json }}
 
   # Optional database ID to connect to. Defaults to 0.
-  dbid: {{ matrix_synapse_redis_dbid }}
+  dbid: {{ matrix_synapse_redis_dbid | to_json }}
 
   # Optional password if configured on the Redis instance
-  #
-  password: {{ matrix_synapse_redis_password }}
+  {% if matrix_synapse_redis_password %}
+  password: {{ matrix_synapse_redis_password | to_json }}
+  {% endif %}
+
+  use_tls: {{ matrix_synapse_redis_use_tls | to_json }}
 
 
 ## Background Updates ##