Responses to AddCarWashType quest should not be exclusive.

[muralito]

Responses to AddCarWashType should not be exclusive.
I need to answer "Self service" and also that the operator can wash your car.

Versions affected
See it v17.

[Atrate]

I can make a PR if @westnordost approves

[westnordost]

If you like, I'd do it also myself before the next bugfix release. I looked into the wiki, there is now (since a few months) a documentation for self_service=only next to yes and no. So this could be used.

The quest should then tag automated=* plus self_service=* for the users' multi-answer.
You can do it if you like, but perhaps it is faster if I do it myself.

[Atrate]

I'll leave it to you, then