Hidden Commits in 4.3

[Augie Fackler]

> On Apr 5, 2017, at 10:01, Ryan McElroy <rm at fb.com> wrote:
> 
> Side-note: +1 on Simon's request to put the doc onto the wiki as a plan.

In general, +1 on wiki pages, but only after the potential for a storm of comments has dwindled: discussion in doc comments is significantly less painful than trying to have meaningful threads of conversation in a wiki page.