RFR:8194298 Add support for per Socket configuration of TCP keepalive

[Alan Bateman]

On 11/05/2018 19:31, Chris Hegarty wrote:
> :
> P.S. A separate issue, but when reviewing this it reminded me that we should deprecate-for-removal jdk/net/Sockets.java. It’s functionality is already supported by a standard API.
>
I think just the methods rather than the class. Lucy Yingqi is working 
on RDMA support (discussion on the nio-dev list) that will add several 
new methods to jdk.net.Sockets.

-Alan.