TFRC-SP and TFRC-PS

Gorry -

> Another minor point, for the next revision:
>
> Checking through the cited documents, I am reminded
that TFRC [RFC3448]
> predicts the future emergence of TFRC-PS (which became
finally 
> TFRC-SP).
>
> A word in the introduction noting the relationship
between the TFRC-SP 
> and
> the TFRC-PS is probably also worth adding?

Thanks, done.

- Sally
http://www.icir.org/floyd/