README.md in fluent-plugin-dd-0.1.3 vs README.md in fluent-plugin-dd-0.1.4

@@ -15,9 +15,10 @@
 <match datadog.**>
   type dd
   dd_api_key ...
   #host my_host.example.com
   #use_fluentd_tag_for_datadog_tag false
+  #emit_in_background false
 </match>
 ```
 
 ## Usage