Some site-migration seems to have taken place from opengl.org to khronos.org. Several generated links in the scribble docs have been broken. For example,
this link, http://www.opengl.org/registry/specs/EXT/separate_shader_objects.txt
redirects here: https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_separate_shader_objects.txt
which is a 404 page.
Some site-migration seems to have taken place from opengl.org to khronos.org. Several generated links in the scribble docs have been broken. For example,
this link, http://www.opengl.org/registry/specs/EXT/separate_shader_objects.txt
redirects here: https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_separate_shader_objects.txt
which is a 404 page.