Port changes from project repos before docs moved

[janbrasna]

There have been a few docs patches included in PRs that only landed after docs stopped publishing from individual project repos and moved here — and these patches were most likely not brought over here afterwards.

I'll try to make a list, and see if the changes are still relevant / necessary, or have been addressed here otherwise.

[janbrasna]

One example is this VPN changeset:

mozilla/bedrock@9f24464#diff-c9c39df371ec1b3781667e02892bad12636508bd07587165ada06939dd667337

vs. https://mozmeao.github.io/platform-docs/measurement/analytics/#product-downloads