News links look like this: http://mabinogi.nexon.net/news/all/1/00IYj/
So for that example the latest ID would be 00IYj.
3/22/2017 - It seems that at some point, Nexon fixed this little logic mistake.
The web server gives the same response (redirect) for unpublished articles and
articles that don't exist, so even if we know an upcoming ID, we can't read it early.
So this is pretty useless now.