[patch] Add a few items to the 3.6 release notes.

[Hans Wennborg]

On Mon, Jan 19, 2015 at 4:41 PM, Rafael Espíndola
<rafael.espindola at gmail.com> wrote:
> I took a quick look at the patches in
>
> git log  $(git merge-base master release_35)..$(git merge-base master
> release_36)
>
> The attached patch adds a few notes that I found missing. I probably
> erred on the side including too much. Just let me know if you think
> something is not relevant for the release notes.

I think this is all good. Thanks for doing this!