Merge from gnus--rel--5.10

Merge from gnus--rel--5.10

Patches applied:

 * gnus--rel--5.10  (patch 257-258)

   - Merge from emacs--rel--22
   - Update from CVS

2007-10-15  Katsumi Yamaoka  <yamaoka@jpl.org>

   * lisp/gnus/gnus-util.el (gnus-string<): New function.

   * lisp/gnus/gnus-sum.el (gnus-article-sort-by-author)
   (gnus-article-sort-by-subject): Use it.

2007-10-15  Katsumi Yamaoka  <yamaoka@jpl.org>

   * lisp/gnus/gnus-win.el (gnus-configure-windows): Focus on the frame for which
   the frame-focus tag is set in gnus-buffer-configuration.

Revision: emacs@sv.gnu.org/emacs--rel--22--patch-128