* wl-vars.el (wl-draft-reply-hook): Changed default value.

* wl-vars.el (wl-draft-reply-hook): Changed default value.
(wl-draft-kill-pre-hook): Set default value as nil.
(wl-summary-reply-hook): Ditto.
(wl-draft-kill-flags): Abolish.

* wl-draft.el (wl-draft-parent-flag): New buffer local variable.
(wl-draft-parent-variables): Renamed from
wl-draft-reply-saved-variables and added wl-draft-parent-flag.
(wl-draft-forward): Call wl-draft-config-info-operation with 'save
argument; Add wl-draft-parent-variables to
wl-draft-config-variables.
(wl-draft-reply): Likewise.
(wl-draft-kill-flags): Abolish.
(wl-draft-send): Call wl-draft-set-flag-on-parent.
(wl-draft-set-flag-on-parent): New function.
(wl-draft-setup-parent-flag): Ditto.