* smtp.el (smtp-default-commands): Abolish.

* smtp.el (smtp-default-commands): Abolish.
(smtp-commands): Abolish.
(smtp-transaction): Delete slots about package information.
(smtp-transaction-function): Abolish.
(smtp-greeting,smtp-ehlo,smtp-helo,smtp-mailfrom,
smtp-rcptto,smtp-data): Define as function.
(smtp-default-transaction-compose-function): New function.
(smtp-closure-partial-apply): New function.
(smtp-transaction-compose-function): New variable.