add synapse config enable_group_creation

roles/matrix-synapse/defaults/main.yml

@@ -155,6 +155,9 @@ matrix_synapse_allow_public_rooms_over_federation: false
 # Controls whether people with access to the homeserver can register by themselves.
 matrix_synapse_enable_registration: false
 
+# Allows non-server-admin users to create groups on this server
+matrix_synapse_enable_group_creation: false
+
 # A list of 3PID types which users must supply when registering (possible values: email, msisdn).
 matrix_synapse_registrations_require_3pid: []
 

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

@@ -1582,7 +1582,7 @@ spam_checker: {{ matrix_synapse_spam_checker|to_json }}
 
 # Uncomment to allow non-server-admin users to create groups on this server
 #
-#enable_group_creation: true
+enable_group_creation: {{ matrix_synapse_enable_group_creation }}
 
 # If enabled, non server admins can only create groups with local parts
 # starting with this prefix