Document unread-is-secret. (Bug 593).

ChangeLog

 2002-06-15  Per Cederqvist  <ceder@ceder.dyndns.org>
 
+	Document unread-is-secret.  (Bug 593).
+	* doc/Protocol-A.texi (Person Status Types): Added a reference to
+	Security, for an explanation of the privileges.  Document the bits
+	in Personal-Flags.
+	(Membership Information): Document how unread-is-secret affects
+	some parts of Membership and Membership-Old.
+
 	Added a test case for bug 349.
 	* src/server/testsuite/lyskomd.0/bug-349.exp: Test case for bug
 	349: wrong error code from set_supervisor.