RFR 8195059: Update java.net Socket and DatagramSocket implementations to use Cleaner

[Chris Hegarty]

On 02/02/18 17:07, Roger Riggs wrote:
> Hi Chris,
> 
> Updated in place.
> http://cr.openjdk.java.net/~rriggs/webrev-net-cleanup-8195059/

Looks good to me.

Trivially ( no need to re-generate the webrev ), in windows
  SocketImpl.c java*_net*_java_net_SocketCleanable

-Chris.