Adding myloader section

Author: davidducos

docs/mydumper_usage.rst

@@ -37,7 +37,7 @@ The :program:`mydumper` tool has several available options:
    Use the given option file. If the file does not exist or is otherwise inaccessible, no failure occurs
 
    Its possible to authenticate via --defaults-file.
-   A section [mydumper] or [client] is needed for authentication
+   A section [mydumper]/[myloader] or [client] is needed for authentication
 
    [mydumper]
    user=