That would be me who changed stuff on the wiki. We have a lot of outdated information, even stuff that still mentions the original xbox, and I've been tasked with cleaning this stuff up. When I do so I don't delete anything, but rather use redirects. When you are taken to a new page after being redirected you can click on the link under the title to go back to that original page and then hit the history tab.
http://wiki.xbmc.org/index.php?title=Web...ldid=27300
So everything is still there and accessible.
Since it's such a big task updating the wiki, so anything out of date as of pre-Eden (and anything not recommended for use going-forward) is a target for being redirected or removed from the main pages/listings/etc. The HTTP API is now unsupported, so.. yeah.. the normal pages for it are redirected and it's no longer listed on the main navigation template. BUT none of it is deleted. Same with the old xBox pages.
I'm even thinking of making an "Archive" namespace in the wiki for when whole pages get outdated, so they can be out of the way but more accessible, but right now there's a lot of other stuff to do on the wiki.
EDIT: I've restored the page for now. Thinking about it, there shouldn't be any harm in having the page itself still working like normal. Maybe I'll make that "Archive" namespace after all.