Adds a given news item of <text> to a channel with the given <subject>. If <expires> isn't 0, that news item will expire <expires> seconds from now. <channel> is only necessary if the message isn't sent in the channel itself.
Changes the news item with <id> from <channel> according to the regular expression <regexp>. <regexp> should be of the form s/text/replacement/flags. <channel> is only necessary if the message isn't sent on the channel itself.
Display the news items for <channel> in the format of '(#id) subject'. If <id> is given, retrieve only that news item; otherwise retrieve all news items. <channel> is only necessary if the message isn't sent in the channel itself.
Returns the old news item for <channel> with <id>. If no number is given, returns all the old news items in reverse order. <channel> is only necessary if the message isn't sent in the channel itself.