* wl-draft.el (wl-draft-do-fcc): No cache save.

* wl-draft.el (wl-draft-do-fcc): No cache save.

* elmo.el (elmo-message-flags-for-append): New function.
(elmo-generic-folder-append-messages): Use it.

* elmo-split.el (elmo-split-subr): Ditto.

* elmo-dop.el (elmo-dop-spool-folder-append-buffer): Add argument
`flags' and use elmo-folder-append-buffer instead of
write-region-as-binary.
(elmo-dop-filter-pending-messages): New function.
(elmo-folder-append-buffer-dop): Call
elmo-dop-spool-folder-append-buffer with `flag'.
(elmo-folder-set-flag-dop): Filter messages by
elmo-dop-filter-pending-messages.
(elmo-folder-unset-flag-dop): Ditto.
(elmo-folder-append-buffer-dop-delayed): Use
elmo-message-flags-for-append to get flags of the message and
simplify.