should go for both Gnus' own folders and the folders Gnus reads from
(e.g. /var/spool/mail/${USER}). All backends this makes sense for.
+ [John Wiegley's article <200011030445.VAA08277@localhost.dynodns.net>,
+ posted on gnu.emacs.gnus does this.
+ Also, gnus-article-encrypt `K E' encrypts the article body.]
+
* The stuff on "Newest Features" in the manual should be implemented
and the node updated (it maybe is?).