set action name to request, this is usually used by custom router to set route result controller name.
Parameters
action
string, action name, it should in lower case style, like "index" or "foo_bar"
format_name
this is introduced in Yaf 3.2.0, by default Yaf will format the name into lower case style,
if this is set to false , Yaf will set the original name to request.
