Fix invalid structural object class chains in test schema

treated as a request for all required and allowed attributes of the class.
This allows:
	ldapsearch (objectClass=*) inetOrgPerson
	(requests return of all attributes of inetOrgPerson)
and
	ldapsearch (objectClass=*) extensibleObject
	(requests return of all attributes, e.g., "+" "*")

Includes rewriting of URLs where the DN of the referral object
and the DN of the ref attribute attribute are not the same.
Also, always returns explicit DN and scope.
Currently, back-ldbm only.  Needs to be ported to back-bdb.

Developed by Julius Enarusai/IBM
Copyright IBM Corp. 2001

Use of this source code is subject to the terms of The OpenLDAP
Public License Version 2.7, 7 September 2001.  No trademarks of the
IBM Corporation are to be used to identify, endorse or promote any
products derived from this code without the prior written consent
of IBM.

there's a bug in the test, because the 'multilinedescription' attribute is not defined anywhere; I trimmed it and added modrdn tests as well

replace with "diff foo - < /dev/null"

and wait. User must hit <NewLine> to continue. This gives the opportunity
to attach a debugger to the slapd before proceeding with the test.

Remove ssf from slapd-schema.conf

the existing database "directory" directive) to allow setting
of a DB_ENV directory.  Should likely be database specific.