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This bug is created as a clone of upstream ticket:
https://fedorahosted.org/sssd/ticket/974

MIT dev team is working on the new type of the credential cache to support the case when one user has multiple tickets for different Kerberos realms. This is a feature of Kerberos 1.10. We need to take advantage of this functionality as soon as it becomes available.

http://k5wiki.kerberos.org/wiki/Projects/Client_principal_selection

Fixed upstream.

We decided to use kernel based credential cache to avoid race conditions. This is not a feature we pursue any more.

Just for the record, the DIR feature is present in the source, just not compiled in (and tested etc)