DP: Create a new handler function getAccountDomain() Adds a new method getAccountDomain() which is a bit similar to getAccountInfo, except it doesn't fetch, parse and store the entry, but just returns the domain or a subdomain the entry was found in. At the moment, the method only supports requests by ID. A default handler is provided (and in this patch used by all the domains) which returns ERR_GET_ACCT_DOM_NOT_SUPPORTED. This return code should be evaluated by the responder so that this DP method is not called again, because it's not supported by the back end type. Reviewed-by: Pavel Březina <pbrezina@redhat.com> Reviewed-by: Sumit Bose <sbose@redhat.com>

dp: add method to refresh access control rules Related: https://pagure.io/SSSD/sssd/issue/2840 Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

sssctl: print active server and server list Resolves: https://fedorahosted.org/sssd/ticket/3069 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

IFP: Provide domain and failover status Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

DP: Add org.freedesktop.sssd.DataProvider.Failover Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

DP: Add org.freedesktop.sssd.DataProvider.Backend Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

DP: Switch to new interface Reviewed-by: Sumit Bose <sbose@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

DP: Introduce new interface for backend Terminology: * Backend: Implemenation of domain * Data Provider: interface between backend and responders * Module: ldap/ipa/ad/... dlopened library that implements dp interface * Target: id/autofs/sudo/... functionality of module Benefits over current code: * data provider is a black box completely separated from backend * method handlers are just simple tevent requests on backend side * no need of spy on be_client * simplified and error proof adding of new responders * simplified adding of new methods * reply to D-Bus message is completely handled by DP code * each target can have several methods defined * properties can be added on objects * each method can have output parameters * modules now support constructor * improved debugging * clear memory hierarchy * ability to chain requests * type safe private data Reviewed-by: Sumit Bose <sbose@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>