AD GPO: Support processing referrals For GPOs assigned to a site, it's possible that their definition actually exists in another domain. To retrieve this information, we need to follow the referral and perform a base search on another domain controller. Resolves: https://fedorahosted.org/sssd/ticket/2645 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

GPO: Don't use stdout for output in gpo_child Resolves: https://fedorahosted.org/sssd/ticket/2544 Use a dedicated fd instead to work around https://bugzilla.samba.org/show_bug.cgi?id=11036 Reviewed-by: Sumit Bose <sbose@redhat.com>

AD-GPO: processing changes for gpo_map_* options Reviewed-by: Sumit Bose <sbose@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

AD-GPO: Remove dependency on libsamba-security Reviewed-by: Sumit Bose <sbose@redhat.com>

Implemented LDAP component of GPO-based access control Reviewed-by: Sumit Bose <sbose@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>