RFR(s): 8208641: SSLSocket should throw an exception when configuring DTLS

[Xuelei Fan]

Looks fine to me.   Please update the copyright years as well.

Thanks,
Xuelei

On 8/28/2018 9:47 PM, Anthony Scarpino wrote:
> I need a review of this fix.  Simple change to throw an 
> UnsupportedOperationException using SSLSocket with DTLS.  Additionally 
> use SSLEngine for some of the generic methods that were defaulting to 
> SSLSocket  This is only for the JSSE provider.
> 
> http://cr.openjdk.java.net/~ascarpino/8208641/webrev/
> 
> Tony
>