(get-unread-confs): Clarify that passive memberships are never returned.

doc/Protocol-A.texi

@@ -2,7 +2,7 @@
 @c
 @c FIXME: Explain how the garb works with nice and keep-commented
 @c
-@c $Id: Protocol-A.texi,v 1.78 1999/06/25 16:24:19 ceder Exp $
+@c $Id: Protocol-A.texi,v 1.79 1999/06/25 21:40:55 ceder Exp $
 @c %**start of header
 @setfilename protocol-a.info
 @settitle LysKOM Protocol A
@@ -5445,6 +5445,7 @@ session must log on as a person with access to that information.
 
 The result is guaranteed to include all conferences where @code{pers-no}
 has unread texts.  It may also return some extra conferences.
+Passive memberships are never returned.
 
 @example
         1 52 7