* wl.el (wl-exit): Call `wl-acap-exit'.

* wl.el (wl-exit): Call `wl-acap-exit'.

* wl-summary.el (wl-summary-message-string): New function.
(wl-summary-reedit): Use it.
(wl-summary-resend-bounced-mail): Remove needless let.
(wl-summary-supersedes-message): Ditto.
(wl-summary-save): Ditto.

* wl-acap.el (wl-acap-original-msgdb-dir): New variable.
(wl-acap-init): Set it.
(wl-acap-exit): New function.

* acap.el (acap-response-bye-p): New function.
(acap-response-bye-message): Ditto.
(acap-wait-for-response): If bye response is received, cause an error.
(acap-parse-response): Make bye response when 'Bye' is received.