[ipv6]: 8224081: SOCKS v4 doesn't work with IPv6

[Arthur Eubanks]

>
> Looks good.
>
> Trivially, maybe amend the comment to be more explicit
>
>    86       // SOCKS V4 ( requires IPv4 )
>
> -Chris.
>
Done
http://cr.openjdk.java.net/~aeubanks/8224081/webrev.02/

I will wait for another review from security-dev.
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