* wl-vars.el (wl-draft-disable-bcc-for-mime-bcc): New user option.

* wl-vars.el (wl-draft-disable-bcc-for-mime-bcc): New user option.
(wl-draft-disable-fcc-for-mime-bcc): Ditto.

* wl-draft.el (wl-draft-deduce-address-list): Disable bcc while
mime-bcc if wl-draft-disable-bcc-for-mime-bcc is non-nil.
(wl-draft-get-fcc-list): Likewise.

* wl-thread.el (wl-thread-indent-regexp): Abolished.
(wl-thread-entity-cur): Ditto.
* wl-summary.el (wl-summary-buffer-set-folder): Removed
wl-thread-indent-regexp	setting.
(wl-summary-sync-update): Removed wl-thread-entity-cur setting.

* wl-summary.el (wl-summary-display-top): Highlight summary window when
wl-summary-lazy-highlight.
(wl-summary-display-bottom): Ditto.

* wl-thread.el (wl-thread-open-close): Likewise.