* gnus.el (ham-process-destination): added new parameter for

* gnus.el (ham-process-destination): added new parameter for
destination of ham articles found in spam groups at summary exit

* spam.el (spam-get-ifile-database-parameter): use spam-ifile-database-path
(spam-check-ifile, spam-ifile-register-with-ifile): use spam-get-ifile-database-parameter
(spam-ifile-database-path): added new parameter for ifile's database
(spam-move-spam-nonspam-groups-only): new parameter to determine
if spam should be moved from all groups or only some
(spam-summary-prepare-exit): fixed logic to use
spam-move-spam-nonspam-groups-only when deciding to invoke
spam-mark-spam-as-expired-and-move-routine; always invoke that
routine after the spam has been expired-or-moved in case there's
some spam left over; use spam-ham-move-routine in spam groups
(spam-ham-move-routine): new function to move ham articles to the
ham-process-destinations group parameter