Merge from gnus--rel--5.10

Merge from gnus--rel--5.10

Patches applied:

 * emacs--devo--0  (patch 548, 550, 553)

   - Update from CVS
   - Merge from gnus--rel--5.10

 * gnus--rel--5.10  (patch 173)

   - Merge from emacs--devo--0

2006-12-08  Chong Yidong  <cyd@stupidchicken.com>

   * lisp/gnus-sum.el (gnus-make-thread-indent-array): New optional arg
   specifying array size.
   (gnus-summary-insert-line, gnus-summary-prepare-threads): Regrow indent
   array if it is too small.
   (gnus-sort-threads-recursive): Renamed from gnus-sort-thread-1.
   (gnus-sort-threads-loop): New function.

Revision: emacs@sv.gnu.org/gnus--devo--0--patch-252