Show HN: underattack.txt Internet Standard

This thing is also not well known yet.

There is no way to introduce things into the .well-known namespace, because they start out not well known and thus don't belong there. Then by the time they are well known, they are stuck with whatever name they have.

If and when it becomes well-known, it can be moved there, and installations can issue an external redirect to it when the old name is accessed.