Improve Synapse variable naming consistency

roles/matrix-synapse/defaults/main.yml

@@ -239,17 +239,17 @@ matrix_s3_media_store_region: "eu-central-1"
 matrix_synapse_self_check_validate_certificates: true
 
 # Controls whether searching the public room list is enabled.
-matrix_enable_room_list_search: true
+matrix_synapse_enable_room_list_search: true
 
 # Controls who's allowed to create aliases on this server.
-matrix_alias_creation_rules:
+matrix_synapse_alias_creation_rules:
   - user_id: "*"
     alias: "*"
     room_id: "*"
     action: allow
 
 # Controls who can publish and which rooms can be published in the public room list.
-matrix_room_list_publication_rules:
+matrix_synapse_room_list_publication_rules:
   - user_id: "*"
     alias: "*"
     room_id: "*"

roles/matrix-synapse/tasks/validate_config.yml

@@ -17,3 +17,6 @@
   with_items:
     - {'old': 'matrix_synapse_container_expose_api_port', 'new': 'matrix_synapse_container_expose_client_api_port'}
     - {'old': 'matrix_synapse_no_tls', 'new': '<removed>'}
+    - {'old': 'matrix_enable_room_list_search', 'new': 'matrix_synapse_enable_room_list_search'}
+    - {'old': 'matrix_alias_creation_rules', 'new': 'matrix_synapse_alias_creation_rules'}
+    - {'old': 'matrix_room_list_publication_rules', 'new': 'matrix_synapse_room_list_publication_rules'}

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

@@ -1179,7 +1179,7 @@ push:
 #
 #enable_room_list_search: false
 
-enable_room_list_search: {{ matrix_enable_room_list_search|to_json }}
+enable_room_list_search: {{ matrix_synapse_enable_room_list_search|to_json }}
 
 # The `alias_creation` option controls who's allowed to create aliases
 # on this server.
@@ -1209,7 +1209,7 @@ enable_room_list_search: {{ matrix_enable_room_list_search|to_json }}
 #    room_id: "*"
 #    action: allow
 
-alias_creation_rules: {{ matrix_alias_creation_rules|to_json }}
+alias_creation_rules: {{ matrix_synapse_alias_creation_rules|to_json }}
 
 # The `room_list_publication_rules` option controls who can publish and
 # which rooms can be published in the public room list.
@@ -1240,4 +1240,4 @@ alias_creation_rules: {{ matrix_alias_creation_rules|to_json }}
 #    room_id: "*"
 #    action: allow
 
-room_list_publication_rules: {{ matrix_room_list_publication_rules|to_json }}
+room_list_publication_rules: {{ matrix_synapse_room_list_publication_rules|to_json }}