insecure_server.conf in fluent-plugin-secure-forward-0.4.3

- old
+ new

@@ -1,10 +1,10 @@
 <source>
-  type secure_forward
+  @type secure_forward
   secure no
   self_hostname localhost
   shared_key hogeposxxx0
 </source>
 
 <match test.**>
-  type stdout
+  @type stdout
 </match>