Univention Corporate Server 4.1 erratum 133 (bugfix)

This update addresses the following issue(s):
* The PTR-Record entries are now sorted numerical in the overview of a
  reverse zone.
* The DNS module now displays more information in the grid columns and
  forward zones are now shown before reverse zones in the tree view.
* Searching for a specific object type underneath of cn=univention in the
  LDAP directory did not yield results and has been repaired.
* Searching for properties which require an exact match did not work because
  the LDAP filter was prepended with "*". The search for e.g. the gidNumber
  of a group is now possible again.
* Searching for properties using the LDAPSearch syntax class caused a
  traceback.
* The users/self module can now be activated again via setting the UCR
  variable "umc/module/udm/users/self/disabled" to "false".