cf741fe send a message if a backend target is not configured

1 file Authored by sbose 14 years ago, Committed by sgallagh 14 years ago,
    send a message if a backend target is not configured
    
    If a backend target is not configured the return code is changed
    from PAM_SYSTEM_ERR to PAM_MODULE_UNKNOWN and an error message is
    sent back to the client.