Remove MODRDN bug from Bugs

Insert reference to ITS webpage

doc/man/man8/slapd.8

@@ -175,8 +175,7 @@ on voluminous debugging which will be printed on standard error, type:
 .LP
 "The SLAPD and SLURPD Administrator's Guide"
 .SH BUGS
-When using the LDBM database backend, the Modify RDN operation does not
-update the attribute values in the entry that are affected by the change.
+See http://www.openldap.org/its/
 .SH ACKNOWLEDGEMENTS
 .B	OpenLDAP
 is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).