Add hook to comments_are_now_closed()

doc/hook/comments_are_now_closed.bb

@@ -0,0 +1,11 @@
+[h3]comments_are_now_closed[/h3]
+
+Called when deciding whether or not commenting is closed for an item.
+
+
+Hook data (array):
+	item => posted item
+	closed => 'unset'
+
+
+To over-ride the default behaviour, change closed to true or false

doc/hooklist.bb

@@ -154,6 +154,9 @@ Hooks allow plugins/addons to "hook into" the code at many points and alter the
 [zrl=[baseurl]/help/hook/comment_buttons]comment_buttons[/zrl]
 	Called when rendering the edit buttons for comments
 
+[zrl=[baseurl]/help/hook/comments_are_now_closed]comments_are_now_closed[/zrl]
+	Called when deciding whether or not to present a comment box for a post
+
 [zrl=[baseurl]/help/hook/connect_premium]connect_premium[/zrl]
 	Called when connecting to a premium channel