HTTP1.1 and older

[LPardue]

Current

HTTP/1.1 and older do not support response multiplexing in a single connection, so there is not a fairness problem.

RFC editor suggestion

HTTP/1.1 and older implementations do not support response multiplexing in a single connection, so there is not a fairness problem.

This seems to be putting the emphasis on the wrong bit. It's the protocol that doesn't support that feature, not any particular implementation. Instead, we could change this to something like

Response multiplexing in a single connection is not supported by HTTP/1.1 (or older), so there is not a fairness problem.