I plan to do the same to extensions.
-- v3: opengl32: Use stored GL version in wrap_glGetString. opengl32: Use stored context GL version in get_integer. opengl32: Hide GL versions larger than 4.3 on wow64 in make_context_current. opengl32: Use stored GL version in check_extension_support. opengl32: Use the actual context GL version in is_extension_supported. opengl32: Factor out make_context_current.