* gnus.texi (Sorting Groups): Add gnus-group-sort-selected-groups.
(Article Washing): Fix typo.
* message.texi (Various Commands): Index message-elide-ellipsis.
Add message-sort-headers.
(Mail Variables): Add message-qmail-inject-args,
message-mailer-swallows-blank-line, message-sendmail-f-is-evil,
message-qmail-inject-program.
(Various Message Variables): Add message-auto-save-directory,
message-strip-special-text-properties, message-cancel-hook.
(News Headers): Index message-user-organization etc.
(Forwarding): Add message-forward-before-signature.
(Mailing Lists): Index message-subscribed-address-file.
(Wide Reply): Add message-wide-reply-confirm-recipients.
(Canceling News): Add message-cancel-message.
(Sending Variables): Add message-interactive.