Update anon

doc/man/man5/slapd.conf.5

@@ -84,6 +84,9 @@ allows anonymous bind when credentials are not empty (e.g.
 when DN is empty).
 .B bind_anon_dn
 allows unauthenticated (anonymous) bind when DN is not empty.
+.B update_anon
+allow unauthenticated (anonymous) update operations to be processed
+(subject to access controls and other administrative limits).
 .TP
 .B argsfile <filename>
 The ( absolute ) name of a file that will hold the