2b4b6b8 SUBDOMAINS: Reuse cached results if DP is offline

Authored and Committed by jhrozek 10 years ago
    SUBDOMAINS: Reuse cached results if DP is offline
    
    If Data Provider was unable to refresh the subdomain list, the
    sss_domain_info->subdomains list was NULL. Which meant that no DP
    request matched any known domain and hence offline authentication was
    not working correctly.
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/2168