Very Old Warnings

[mnot]

Note: Some HTTP/1.0 caches might not implement Cache-Control.

Is this warning still relevant? If we want to keep it, I think we need to qualify it; e.g., "A few old HTTP/1.0 caches that are unlikely to be used on the open Internet..."

Similar text in cc: no-cache.

[royfielding]

I think the warnings can be removed.