Code review request, 8020842 IDN do not throw IAE when hostname ends with a trailing dot

[Xuelei Fan]

On 8/9/2013 11:24 AM, Matthew Hall wrote:
> But, DNS considers "." as the valid root zone...
> 
Good! Looks like that IDN.toASCII(".") should returns ".", so that a
general domain name can always use IDN.toASCII() conversion instead of
throwing runtime exception.

Xuelei