Bug 527912 - setup-ds.pl appears to hang when DNS is unreachable
    
    The setup-ds.pl program will appear to hang when it attempts to
    contact an unreachable DNS server to determine the FQDN.  The
    hostname prompt will eventually be displayed after a network
    timeout is hit.
    
    This patch makes the setup program log a warning message just
    prior to trying to determine the FQDN.  This message states that
    setup may appear to hang if it can't reach the DNS servers, and
    that one can re-run setup and pass the hostname as an option on
    the command line instead.