re.

including:
- fixes according to new API changes
- closing db connection in connection_destroy callback, not unbind
- support of new schema code, samples changed accordingly
- support for multiple objectclasses (to distinguish from unique objectclass-to-tables mapping)
- auto 'ref' attribute support
- samples now include illustrations of using these 2 features to make named referrals as described in ldapext-namedref draft

more to come:
- documentation update
- different improvements to be more close to native directory (after beta?)

type.  Add type to core.schema.  Not yet populated on add nor checked on modify.

(actually, ACL here might be dangerous)

Remove slurpd kbind support as this requires LDAPv2
Backout back-ldbm/referrals.c update_ndn hack