README.rdoc in fluent-plugin-couch-0.5.0 vs README.rdoc in fluent-plugin-couch-0.6.0

@@ -30,9 +30,10 @@
       port 10000                   #default:5984
       protocol https               #default:http
 
       update_docs true             #default:false
       doc_key_field doc_id         #default:nil
+      doc_key_jsonpath $.event.key #default:nil
 
       refresh_view_index viewname  #default:nil
 
       # for Basic Authentication (optional)
       user odagiri