That's "normal". It is a wiki and nobody has written this article yet. Feel free to start it !
Oh, and I have edited the link to use the new URL scheme (and it appears in red right now). (We have a bug to have these olds URLs appear in red, I think; or at least to be renamed to the new scheme)
And thank you very much for the bug report. Much appreciated! :-) (Sorry I forgot, I was in a hurry! :-) )