(pmail-perm-variables): Don't call pmail-parse-file-inboxes.

(pmail-perm-variables): Don't call pmail-parse-file-inboxes.
(pmail-parse-file-inboxes): Function deleted.
(pmail-get-new-mail-1): Function merged into pmail-get-new-mail.
(pmail-get-new-mail-2): Renamed to pmail-get-new-mail-1.
(pmail-get-new-mail-filter-spam): Call rmail-spam-filter, not
pmail-spam-filter.
(pmail-convert-to-babyl-format): Function deleted.
(pmail-nuke-pinhead-header): Function deleted.
(pmail-reply): Parsing headers in mbox format.  Call
rmail-dont-reply-to instead of pmail-dont-reply-to.