Univention Corporate Server 4.1 erratum 365 (bugfix)

This update addresses the following issue(s):
* The init-script has been fixed to check for an already running instance of
  the S4 connector. The PID file is removed on shutdown. The 'status' action
  has been added, too.
* When adjusting a GPO security filter via Group Policy Management Console
  repeatedly in a short time, the S4-Connector could revert changes,
  depending on timing. Now the S4-Connector checks if a change has happened
  in Samba/AD since the last sync and avoids overwriting the attribute
  nTSecurityDescriptor in that case.
* The synchronization of DNS zones now also works in special setups, where
  samba4/ldap/base differs from ldap/base.