It backports 113cfd5e, 22d09e87 and several typo fixes from Antoni Bella Pérez (7e34797f, 68daa8e3, a67cdf3b, f4f0e5be, 32b79ab2, d084965a, squished and edited to only include changes to user_support page).
It doesn't include !58 (merged) yet (I will make a separate merge request for that).
