RFR: 8213952: Relax DNSName restriction as per RFC 1123

[Weijun Wang]

The change looks fine to me.

Thanks
Max

> 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.