Synch with Gnus trunk.

Synch with Gnus trunk.
2009-09-22  Daiki Ueno  <ueno@unixuser.org>

 * mm-encode.el (mm-sign-option, mm-encrypt-option): New user option.
 * mml2015.el (mml2015-epg-sign, mml2015-epg-encrypt): Let users select
 keys from the menu if mm-{sign,encrypt}-option is 'guided.
 * mml-smime.el (mml-smime-epg-sign, mml-smime-epg-encrypt): Ditto.
 * mml1991.el (mml1991-epg-sign, mml1991-epg-encrypt): Ditto.

2009-09-15  Katsumi Yamaoka  <yamaoka@jpl.org>

 * gnus-art.el (gnus-article-edit-part): Work for the buffer
 configuration that provides the sole article window in a frame;
 position point correctly after deleting a part.

2009-09-14  Adam Sjøgren  <asjo@koldfront.dk>

 * spam.el (spam-unregister-on-reregister): Add boolean variable.
 (spam-resolve-registrations-routine): Use it to unregister articles
 that change status.