implement unregister_dialog_controller/1, set_dialog_expires/2 and generate_new_request/4
implement unregister_dialog_controller/1, set_dialog_expires/2 and generate_new_request/4

git-svn-id: 3f662d0c7823f96a484d6a9a7c90f2d7866b6747@1405 e454d3dc-12ff-0310-9b8b-94264392205f

bernardd/yxa,bernardd/yxa,bernardd/yxa,bernardd/yxa