Univention Corporate Server 4.3 erratum 103 (bugfix)

This update addresses the following issues:
* In case `connector/s4/mapping/group/syncmode` is set to "write" in UCR,
  the S4-Connector would still modify groups in OpenLDAP when a user
  was modified. This affected UCS@school.
* Rejects for non-ascii Samba/AD accounts are not handled properly due
  to sqlite encoding problem. This has been fixed.
* The listener module now restarts the connector if extended attributes
  are modified.
* Added support for option `--bindpwdfile` during join.
* When objects are deleted or moved remove the their DN from
  both group member mapping caches. This affected UCS@school.