* elmo-dop.el (elmo-dop-msgdb): Rewrite.

* elmo-dop.el (elmo-dop-msgdb): Rewrite.

* modb-legacy.el (elmo-msgdb-overview-entity-get-id-internal): New
inline function.
(elmo-msgdb-overview-entity-get-number-internal): Ditto.
(elmo-msgdb-overview-entity-set-number,
elmo-msgdb-overview-entity-get-references,
elmo-msgdb-overview-entity-set-references,
elmo-msgdb-overview-entity-get-from-no-decode,
elmo-msgdb-overview-entity-get-from,
elmo-msgdb-overview-entity-set-from,
elmo-msgdb-overview-entity-get-subject,
elmo-msgdb-overview-entity-get-subject-no-decode,
elmo-msgdb-overview-entity-set-subject,
elmo-msgdb-overview-entity-get-date,
elmo-msgdb-overview-entity-set-date,
elmo-msgdb-overview-entity-get-to,
elmo-msgdb-overview-entity-get-cc,
elmo-msgdb-overview-entity-get-size,
elmo-msgdb-overview-entity-set-size,
elmo-msgdb-overview-entity-get-extra,
elmo-msgdb-overview-entity-set-extra,
elmo-msgdb-overview-entity-get-extra-field,
elmo-msgdb-overview-entity-set-extra-field): Moved to elmo-msgdb.el.
(elmo-msgdb-make-index): Use
`elmo-msgdb-overview-entity-get-number-internal'.
(elmo-msgdb-clear-index): Ditto.
(elmo-msgdb-append-entity): Ditto;
Use `elmo-msgdb-overview-entity-get-id-internal'.

* elmo-msgdb.el (elmo-msgdb-overview-entity-get-number,
elmo-msgdb-overview-entity-set-number,
elmo-msgdb-overview-entity-get-references,
elmo-msgdb-overview-entity-set-references,
elmo-msgdb-overview-entity-get-from-no-decode,
elmo-msgdb-overview-entity-get-from,
elmo-msgdb-overview-entity-set-from,
elmo-msgdb-overview-entity-get-subject,
elmo-msgdb-overview-entity-get-subject-no-decode,
elmo-msgdb-overview-entity-set-subject,
elmo-msgdb-overview-entity-get-date,
elmo-msgdb-overview-entity-set-date,
elmo-msgdb-overview-entity-get-to,
elmo-msgdb-overview-entity-get-cc,
elmo-msgdb-overview-entity-get-size,
elmo-msgdb-overview-entity-set-size,
elmo-msgdb-overview-entity-get-extra,
elmo-msgdb-overview-entity-set-extra,
elmo-msgdb-overview-entity-get-extra-field,
elmo-msgdb-overview-entity-set-extra-field): Moved from modb-legacy.el
and rewrote for backward compatibility.