Add patches from Eli Tziperman <eli@beach.weizmann.ac.il>, and John Paul

Add patches from Eli Tziperman <eli@beach.weizmann.ac.il>, and John Paul
Wallington <jpw@gnu.org>

Avoid loading CL at runtime.

(vm-use-spam-filter.el, spam-filter-working-with-vm): Add support for
use by VM.

(rmail-spam-filter-min-region-length-added-to-spam-list): New
variable.

(rmail-spam-filter): Do not assume the message is narrowed, do it
explicitly using the rmail message descriptor; use `rmail-output'
instead of `rmail-output-to-rmail-file'; take into account the state
of the `rmail-delete-after-output' variable.

(rmail-spam-filter-add-region-to-spam-list,
spam-filter-bbdb-dont-create-entries-for-deleted-messages): Rewrite.