The word "genuine" has been dropped from the title to make it more value-neutral.
Also "protocol-level" has been dropped since it is unclear whether or not the
proposal requires consensus protocol changes. Editor's notes have been added.
Some references to the Zcash Foundation have been changed to also include ECC,
since that seems to reflect the author's intent per
https://forum.zcashcommunity.com/t/final-zip-proposal-genuine-protocol-opt-in-out-donation-feature-updated-02-sept/33846/24
Signed-off-by: Daira Hopwood <daira@jacaranda.org>