8218559: Reimplement the Legacy Socket API

[Chris Hegarty]

Alan,

> On 9 May 2019, at 14:00, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> Thanks Chris and Michael for the reviews/help so far. I've uploaded a new webrev to address most of their points here:
>    http://cr.openjdk.java.net/~alanb/8221481/2/webrev/index.html
> 
> and delta webrev with the changes from 1 to 2 here:
>    http://cr.openjdk.java.net/~alanb/8221481/1to2/webrev/index.html


This addresses my comments / concerns. Reviewed.

-Chris.

P.S. Thanks for generating the delta-webrev.