6935563: (dc) Improve connection reset/port unreachable handling [win

[Chris Hegarty]

Alan,

The changes look good.

-Chris.

Alan Bateman wrote:
> 
> Chris - would you mind looking at this one? It's a Windows specific 
> issue that rises with unconnected datagram channels when an ICMP 
> destination unreachable message is received. As the channel is 
> unconnected then the message should be dropped and shouldn't cause a 
> Selector to wakeup. In order to get the expected behavior we need to use 
> the SIO_UDP_CONNRESET control code to toggle whether we receive the 
> connection reset error or not. The changes are very simple and the 
> webrev is here:
>   http://cr.openjdk.java.net/~alanb/6935563/webrev/
> 
> Thanks,
> Alan.