Trac Ticket #46 - (take 3) setup-ds-admin.pl does not like ipv6 only hostnames
    
    https://fedorahosted.org/389/ticket/46
    
    Fix Description:
    Perl functions (gethostbyname, gethostbyaddr) do not support IPv6
    addresses.  This patch addes the IPv6 support if an IPv6 enabled
    socket module is available.  If Socket::addrinfo subsystem is
    found, use getaddrinfo and getnameinfo from the module. If not
    and if Socket6 module is available, the module is used.  If both
    are not found on the system, the existing non-IPv6 methods are
    called.