Or just remove your email address from the copyright notice. A name should be enough.

Don't know why this downvoted. Perhaps the wording used? Because the idea is correct. One way to fix would be, for example, changing the license in any future version to read "If you're using this software inside any component that will be used in a car, you should display the Copyright_automotive.txt contents instead of this one"

If you're really going to complicate displaying the license, you could try to compel the company using libcurl to provide their support contact information immediately before the license text.

I doubt it would actually work.

True, although I can also imagine curl being used in other types of devices. This makes things a bit more complicated I guess.