So it better matches its content.

It's only used now in scenarios involving cloning: install-clone,
mac-clone, upgrade-clone, and upgrade-tails.

I'm reusing the text that we had on /install/mac/usb for using `dd`.
See 6b3f8325 or the current master branch.

The Oxford comma is for lists of 3 or more items.

It's about encouraging even smaller donations.

We'll work on this in #16116.

First done with the 3.10 and 3.10.1 releases.

Update who shall be notified in order to have ikiwiki.setup changes deployed on our production website (refs: #14588).

We're not going to maintain two versions of these rewrite rules,
one in Apache language, the other in nginx-speak.