NCACHE: Store FQDNs internaly, check for shortnames in files When storing users and groups by their name in the negative cache, store them fully qualfied so that the responder only has to track the name in the internal format once the input is converted. Reviewed-by: Sumit Bose <sbose@redhat.com>

TEST: New tests for negative caching of locals Negative cache has special timeout for local entities (users, groups). This patch adds new tests for such behaviour. The tests are based on cwrap. Resolves: https://fedorahosted.org/sssd/ticket/2928 Reviewed-by: Pavel Březina <pbrezina@redhat.com>