Univention Corporate Server 3.2 erratum 25 (bugfix)

This update fixes a bug in the configuration file parsing of the
UCS 3.2 Samba winbind daemon, which caused trust relations to
Windows Active Directory domains to fail (direction: UCS Samba
NT domain trusts Windows AD domain).
Now there is a new UCR variable samba/winbind/rpc/only.
In UCS 3.2 Samba NT domains this needs to be set to "yes" to allow
trusts relations to Microsoft Windows AD domains.