Documentation fixes.

ChangeLog

@@ -30,6 +30,8 @@
 	compatibility magic.  Include the number of the protocol request
 	in the printed heading of the corresponding section.
 	(set-pers-flags): Fix sectioning error.
+	(get-unread-confs): Clarify that passive memberships are never
+	returned.
 
 	Performance fix.
 	* src/server/internal-connections.c: Turn off defensive checks in