Univention Corporate Server 4.2 erratum 19 (bugfix)

This update addresses the following issue(s):
* The UCR variable samba/idmap/range has been added
  to configure the uid and gid range for the default (*)
  idmap backend. This can be used to avoid overlaps between
  that default range and the domain specific setting, which is
  configurable via samba/idmap/$windows_domain/range.
* The UCR variables samba/client/min/protocol, samba/min/protocol
  and samba/client/max/protocol have been added.
  Please be aware that raising samba/min/protocol e.g. to SMB2 also
  requires raising samba/client/max/protocol to that value or higher.