updated whatsapp config, backfill doesn't work

docs/configuring-playbook-bridge-mautrix-whatsapp.md

@@ -10,6 +10,15 @@ Use the following playbook configuration:
 matrix_mautrix_whatsapp_enabled: true
 ```
 
+## Enable backfilling history
+This requires a server with MSC2716 support, which is currently an experimental feature in synapse.
+Note that as of Synapse 1.46, there are still some bugs with the implementation, especially if using event persistence workers.
+
+Use the following playbook configuration:
+
+```yaml
+matrix_bridges_backfill_enabled: true
+```
 
 ## Set up Double Puppeting
 

roles/matrix-bridge-mautrix-whatsapp/templates/config.yaml.j2

@@ -10,7 +10,7 @@ homeserver:
     # The URL to push real-time bridge status to.
     # If set, the bridge will make POST requests to this URL whenever a user's whatsapp connection state changes.
     # The bridge will use the appservice as_token to authorize requests.
-#    status_endpoint: "null"
+    status_endpoint: "null"
 
 appservice:
     # The address that the homeserver can use to connect to this appservice.