Hi,
there is missing GL_MAX_SAMPLES in glGet doc (https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGet.xhtml). GL_MAX_SAMPLES was introduced in OpenGL 3.0 by GL_EXT_framebuffer_multisample and it is present in OpenGL specification and its state tables with the following text: "Maximum number of samples supported for multisampling."

Just wondering how this might escape from attention of all of us for ten years ;-).
John