AD: Remember last site discovered in sysdb This can speed up sssd startup. Resolves: https://pagure.io/SSSD/sssd/issue/3265 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

FO: Use SRV TTL in fail over code Resolves: https://fedorahosted.org/sssd/ticket/1884 Removes the hardcoded SRV TTL timeout and uses TTL from the DNS instead. Reviewed-by: Pavel Březina <pbrezina@redhat.com>

AD: support for AD site override Override AD site found during DNS discovery. Resolves: https://fedorahosted.org/sssd/ticket/2486 Reviewed-by: Pavel Březina <pbrezina@redhat.com>

Fix czech specific character in my name

DNS sites support - add AD SRV plugin https://fedorahosted.org/sssd/ticket/1032