(ITS#6942) updateref config is inadequate

[hyc@OpenLDAP.org]

Full_Name: Howard Chu
Version: 2.4.x
OS: 
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (76.94.188.8)
Submitted by: hyc


This was pointed out on the mailing list, I've lost the exact message now.

We allow multiple consumers in a single DB, but we only allow a single updateref
on the DB. This is clearly broken; we need to be able to specify an updateref
per consumer.

This also ties in with other discussions about moving updateref processing out
of the frontend. Doing it in the frontend was OK back in OpenLDAP 2.3 and
earlier, but not any more.