Add new command gnus-article-sort-by-marks

* doc/misc/gnus.texi (Summary Sorting): Mention
gnus-summary-sort-by-marks.

* lisp/gnus/gnus-sum.el (gnus-article-sort-by-marks): New
function (bug#23393).
(gnus-thread-sort-by-marks): Ditto.
(gnus-summary-sort-by-mark): New command suggested by Dan Jacobson.
(gnus-summary-mode-map): Add keystroke.
(gnus-summary-make-menu-bar): Add to menu.

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/misc/gnus.texi b/doc/misc/gnus.texi
index 4b0d0cac233..ceeb42b9182 100644
--- a/doc/misc/gnus.texi
+++ b/doc/misc/gnus.texi
@@ -10197,6 +10197,11 @@ Sort by lines (@code{gnus-summary-sort-by-lines}).
 @findex gnus-summary-sort-by-chars
 Sort by article length (@code{gnus-summary-sort-by-chars}).
 
+@item C-c C-s C-m C-m
+@kindex C-c C-s C-m C-m (Summary)
+@findex gnus-summary-sort-by-marks
+Sort by article ``readedness'' marks (@code{gnus-summary-sort-by-marks}).
+
 @item C-c C-s C-i
 @kindex C-c C-s C-i (Summary)
 @findex gnus-summary-sort-by-score