README.md in fluent-plugin-http_shadow-0.0.8 vs README.md in fluent-plugin-http_shadow-0.0.9

@@ -32,10 +32,11 @@
     "time": "22/Dec/2014:03:20:26 +0900",
     "method": "GET",
     "path": "/hoge/?id=1",
     "code": "200",
     "size": "1578",
+    "x_forwarded_proto": "http",
     "referer": "http://exsample.com/other/",
     "agent": "Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko"
   }
 ```
 
@@ -60,9 +61,10 @@
   host_key host
   path_format ${path}
   method_key method
   protocol_format ${x_forwarded_proto} # default: http
   header_hash { "Referer": "${referer}", "User-Agent": "${user_agent}" }
+  no_send_header_pattern ^(-|)$
 </match>
 ```
 
 ## Examples(use cookie)
 ```