* gnus-uu.el (gnus-uu-digest-mail-forward): Mark as forwarded.

* gnus-uu.el (gnus-uu-digest-mail-forward): Mark as forwarded.

* gnus-msg.el (gnus-put-message): Clean up.
(gnus-summary-reply): Mark all replied-to articles as replied to.
(gnus-inews-add-send-actions): Also mark as forwarded.
(gnus-summary-mail-forward): Mark as forwarded.

* gnus-sum.el (gnus-summary-mark-article-as-replied): Take a list
of articles.
(gnus-summary-mark-article-as-forwarded): Ditto.

* gnus-msg.el (gnus-summary-resend-message): Mark article as
forwarded.
(gnus-summary-mail-forward): Clean up.

* gnus.el (gnus-article-mark-lists): Added forward.

* gnus-sum.el (gnus-forwarded-mark): New variable.
(gnus-summary-prepare-threads): Use it.
(gnus-summary-update-secondary-mark): Ditto.
(gnus-newsgroup-forwarded): New variable.