The API docs for libogc over at https://libogc.devkitpro.org/api_doc.html have been unavailable for a few days now. There's just a page with a CloudFlare Error (526 "Invalid SSL certificate").
The fantastic Wayback Machine makes this less of an issue than it could have been, but it'd be nice if the person responsible for that site (WinterMute, probably?) could look into this