* wl-vars.el (wl-summary-new-uncached-mark): Renamed from

* wl-vars.el (wl-summary-new-uncached-mark): Renamed from
wl-summary-new-mark.
(wl-summary-new-cached-mark): New user option.
(wl-summary-score-marks): Follow the change above.
(wl-summary-auto-refile-skip-marks): Ditto.
(wl-summary-incorporate-marks): Ditto.
(wl-summary-expire-reserve-marks): Ditto.

* wl-spam.el (wl-spam-auto-check-marks): Ditto.

* wl-summary.el (wl-summary-detect-mark-position): Ditto.
(wl-summary-persistent-mark-string): Distinguished between cached
and uncached mark when the message is new.

* elmo-msgdb.el (elmo-flag-table-get): Check cached if saved flags
is nil.