RFR: 8213952: Relax DNSName restriction as per RFC 1123

[Chris Hegarty]

>> On Dec 4, 2018, at 1:11 AM, Seán Coffey <sean.coffey at oracle.com> wrote:
>>
>> whoops:
>> latest webrev : http://cr.openjdk.java.net/~coffeys/webrev.8213952.v4/webrev/
>> Regards,
>> Sean.
> 

Looks good.

-Chris.