R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/
7303065
go1.txt (and similarly named files) are frozen once a version has been
shipped. Each file adds new lines but does not remove any.
-except.txt lists features that may disappear without breaking
-true compatibility. The only package there is text/template/parse.
+except.txt lists features that may disappear without breaking true
+compatibility.
next.txt is the only file intended to be mutated. It's a list of
features that may be added to the next version. It only affects