This updates registry URLs so that we can download the header files.
curl https://www.khronos.org/registry/OpenGL/api/GL/glcorearb.h
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>301 Moved Permanently</title>
</head><body>
<h1>Moved Permanently</h1>
<p>The document has moved <a href="https://registry.khronos.org/OpenGL/api/GL/glcorearb.h">here</a>.</p>
</body></html>
This updates registry URLs so that we can download the header files.