Fix links to all broken Hugi online articles

[psenough]

There are a few pages with links to online hugi articles which have gone 404 since they changed their page structure.

The articles can still be found online here
http://www.hugi.scene.org/online/coding/hugi%20se%204%20-%20index%20sorted%20by%20topic.htm

And most of the link references on in4k include a "local" copy pointing to a working untergrund.net link, but it still needs to get cleaned up.

I would suggest all links need to be updated to either link to new remote url or convert the html to markdown and include it in the wiki directly.

I'm too lazy to fix them all right now since there are a lot of them and most of them are deprecated info, but if anyone wants to pick this up and clean it up you have here the details on why i left it pending.