include: Define IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT and code for IN6_IS_ADDR_LOOPBACK

[James McKenzie]

Jeff Latimer wrote:
> Jeff Latimer wrote:
>> This patch enables putty to compile and run using IPv6.
> I meant to say that André Hentschel was doing the hard work with putty
> and merely ask me to do this little bit.
>
> Jeff
>
>
Thank you for doing the heavy lifting to all who are working on this.

James McKenzie