2003-04-14  Shailesh Mittal <shailesh.mittal@wipro.com>

        * configure.in: Added option for enabling IPv6 support.
        Added checks for function getaddrinfo().

2003-04-14  Shailesh Mittal  <shailesh.mittal@wipro.com>

        * main.c:
        (have_ipv6): Added for checking runtime IPv6 support.
        (check_for_dns): gethostbyname() returns NULL on
        IPv6 only machines, so modified to use getaddrinfo(),
        if runtime IPv6 support and getaddrinfo() are there,
        otherwise gethostbyname() is used.