Doc updates on v-c.o

[Dridi Boukelmoune]

On Thu, Mar 14, 2019 at 9:23 PM Geoffrey Simmons <geoff at uplex.de> wrote:
>
> @Dridi, the sentence about Python under “for developers” in “Changes” implies that python 2 is still an option. I assume that’s no longer correct? That went in fairly early, before the decision about python 3 was made.

Right, I did not catch that one and added the note about dropping
python 2 in the Upgrading document.

I'm fixing it now.

Dridi