* gnus-group.el (gnus-group-is-exiting-without-update-p): New.

* gnus-group.el (gnus-group-is-exiting-without-update-p): New.
* gnus-sum.el (gnus-summary-exit-no-update): Use it.
* gnus-sum.el (gnus-summary-expire-articles): Use it.
* spam.el (spam-summary-prepare-exit): Use it.
* gnus.el (gnus-install-group-spam-parameters): New.
* spam.el (spam-group-ham-processor-copy-p): New.
* spam.el (spam-summary-prepare-exit): Support for ham copying.
* spam.el (spam-mark-spam-as-expired-and-move-routine): Fix bug
that would cause the current message to be moved if the group had
no spam.
* spam.el (spam-ham-move-routine): New `copy' argument.