Update mautrix-facebook configuration (invitation, backfilling support)

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

@@ -111,10 +111,24 @@ bridge:
         # Default to encryption, force-enable encryption in all portals the bridge creates
         # This will cause the bridge bot to be in private chats for the encryption to work properly.
         default: false
-
     # Whether or not the bridge should send a read receipt from the bridge bot when a message has
     # been sent to Facebook.
     delivery_receipts: false
+    # Whether to allow inviting arbitrary mxids to portal rooms
+    allow_invites: false
+    # Settings for backfilling messages from Facebook.
+    backfill:
+        # Whether or not the Facebook users of logged in Matrix users should be
+        # invited to private chats when backfilling history from Facebook. This is
+        # usually needed to prevent rate limits and to allow timestamp massaging.
+        invite_own_puppet: true
+        # Maximum number of messages to backfill initially.
+        # Set to 0 to disable backfilling when creating portal.
+        initial_limit: 0
+        # Maximum number of messages to backfill if messages were missed while
+        # the bridge was disconnected.
+        # Set to 0 to disable backfilling missed messages.
+        missed_limit: 1000
 
     # Permissions for using the bridge.
     # Permitted values: