* gnus-agent.el (gnus-agent-long-article,

	* gnus-agent.el (gnus-agent-long-article,
	gnus-agent-short-article, gnus-agent-score): Renamed category
	keywords to match gnus-cus.
	(gnus-agent-summary-fetch-series): Modified to protect against
	gnus-agent-summary-fetch-group clearing processable flags.
	(gnus-agent-synchronize-group-flags): Update live group buffer as
	synchronization may occur due to the user toggle the plugged
	status.
	(gnus-agent-fetch-group-1): Clear downloadable flag when article
	successfully downloaded.
	(gnus-agent-expire-group-1): Avoid using markers when the overview
	is in ascending order; greatly improves performance.
	(gnus-agent-regenerate-group): Use
	gnus-agent-synchronize-group-flags to reset read status in both
	gnus and server.
	(gnus-agent-update-files-total-fetched-for): Fixed initial size.