GitLab

	* gnus-util.el (gnus-directory-sep-char-regexp): New.
	* gnus-score.el (gnus-score-find-bnews): Sync with Gnus CVS.
	* mm-util.el: Sync.

	* gnus-sum.el (gnus-summary-limit-to-subject): An exclusion version.
	(gnus-summary-limit-to-author): Ditto.
	(gnus-summary-limit-to-extra): Ditto.
	(gnus-summary-find-matching): Support not-matching argument.

	* message.el (message-wash-subject): Use `insert' rather than
	`insert-string', which is deprecated.
	From  Kai Gro,A_(Bjohann  <Kai.Grossjohann@CS.Uni-Dortmund.DE>