See https://github.com/spf13/hugo/commit/6d2281c8ead70ac07122027c989807c0aa1a7722
It is merged into master, but not in a release yet.
I will not go into details (it needs some doc), but this will, hopefully, make the people shouting about their /index.md etc. sites not working anymore since Hugo 0.18 (because of naming conflict with the home page or section etc.) happier.
With this you can turn off what you do not want.