GLX_EXT_swap_control
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
GLX_EXT_swap_control

	GLX_SWAP_INTERVAL_EXT 0x20F1
	GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
	void glXSwapIntervalEXT (Display* dpy, GLXDrawable drawable, int interval)