set controller name to request, this is usually used by custom router to set route result controller name.
Parameter-Liste
controller
String, controller name, this should be in camel style, like "Index" or "Foo_Bar"
format_name
this is introduced in Yaf 3.2.0, by default Yaf will format the name into camel mode,
if this is set to false , Yaf will set the original name to request.
