I was going to say: isn't "Content-type: image/webp" one byte larger than "Content-type: image/gif", making this useless? But apparently 204 No Content allows

I was going to say: isn't "Content-type: image/webp" one byte larger than "Content-type: image/gif", making this useless? But apparently 204 No Content allows you to omit Content-type. Leaving this up in case anyone else was wondering :)