For v1.1.0rfc2, seriesv0

This updated RFC version introduces low-impact changes into the DFXML schema, and clarifies the schema license.

I will commit these as the next RFC tomorrow afternoon (Sep. 20), Eastern time.

I would appreciate review of these (very small) changes; reviewing should take under two minutes.  If you approve of the individual patches or the whole series, I would like to log your approval with an `Acked-by: Your name <your@email>` (or there is a Github variant of an email address, `<your_github_username@users.noreply.github.com>`).  Commenting here or emailing me would work fine.

--Alex