Univention Corporate Server 3.2 erratum 116 (bugfix)

This update fixes the following issues:
* The case of distinguished names (DN) sometime differs between different
  clients and is now ignored.
* A rename of an LDAP object can lead to a single-values attribute becoming
  multi-valued, which breaks multiple modules, especially the synchronization
  to Samba. The listener now implements delold=1 and removes all old RDNs to
  just keep the new RDN.