* wl-summary.el (wl-summary-sync-update): Don't call

* wl-summary.el (wl-summary-sync-update): Don't call
wl-summary-update-status-marks.

* modb.el (elmo-msgdb-flag-count): New API.

* modb-standard.el (modb-standard): Added slot flag-count.
(modb-standard-countup-flags): New function.
(modb-standard-load-flag): Call it.
(elmo-msgdb-append): Ditto.
(elmo-msgdb-clear): Clear slot flag-count.
(elmo-msgdb-set-flag): Call modb-standard-countup-flags.
(elmo-msgdb-unset-flag): Treat `all' flag and call
modb-standard-countup-flags.
(elmo-msgdb-flag-count): Define.
(elmo-msgdb-append-entity): Call modb-standard-countup-flags.
(elmo-msgdb-delete-messages): Ditto.

* modb-legacy.el (elmo-msgdb-unset-flag): Treat `all' flag.
(elmo-msgdb-flag-count): Define.

* elmo.el (elmo-folder-list-messages): Undo last change.
(elmo-folder-count-flags): Use elmo-msgdb-flag-count.
(elmo-folder-kill-messages): Unset all flags to numbers.

* elmo-sendlog.el (elmo-folder-delete-messages): Rewrite; use
elmo-folder-kill-messages.

* elmo-nntp.el (elmo-folder-delete-messages): Ditto.
(elmo-nntp-folder-delete-messages): Abolish.