As suggested in the post-commit thread for rL331056, we should match these clang options with the established vocabulary of the corresponding sanitizer option. Also, the use of 'strict' is well-known for these kinds of knobs, and we can improve the descriptive text in the docs.
So this intends to match the logic of D46135 but only change the words. I'll post the matching LLVM patch next and link it to this.