README.md in s3_website-2.3.1 vs README.md in s3_website-2.4.0

@@ -167,9 +167,12 @@
 ignore_on_server:
   - that_folder_of_stuff_i_dont_keep_locally
   - file_managed_by_somebody_else
 ```
 
+If you add the magic word `ignore_on_server: _DELETE_NOTHING_ON_THE_S3_BUCKET_`,
+`s3_website push` will never delete any objects on the bucket.
+
 ### Excluding files from upload
 
 You can instruct `s3_website` not to push certain files:
 
 ```yaml