make smtp tls configurable / optional

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

@@ -5,6 +5,9 @@ matrix_synapse_federation_api_url_endpoint_public: "https://{{ matrix_server_fqn
 
 matrix_synapse_media_store_directory_name: "{{ matrix_synapse_media_store_path | basename }}"
 
+# Optionally: `false` to fully disable tls on outbound smtp
+matrix_synapse_email_smtp_enable_tls: true
+
 # A Synapse generic worker can handle both federation and client-server API endpoints.
 # We wish to split these, as we normally serve federation separately and don't want them mixed up.
 #