render: SDL_HINT_RENDER_DRIVER now accepts a comma-separated list.

Fixes #11077.

include/SDL3/SDL_render.h

@@ -219,6 +219,9 @@ extern SDL_DECLSPEC bool SDLCALL SDL_CreateWindowAndRenderer(const char *title,
  * don't need a specific renderer, specify NULL and SDL will attempt to choose
  * the best option for you, based on what is available on the user's system.
  *
+ * If `name` is a comma-separated list, SDL will try each name, in the order
+ * listed, until one succeeds or all of them fail.
+ *
  * By default the rendering size matches the window size in pixels, but you
  * can call SDL_SetRenderLogicalPresentation() to change the content size and
  * scaling options.