Allow relative URLs and no trailing `index.html`

I'm trying to achieve relative URLs (don't want to hardcode the domain) but also want links to point to folders, not `index.html`. For example, I want this output:

```html
Example post
```

but I'm getting this with **Allow offline usage** checked:

```html
Example post
```

"Offline usage" is not a great switch in my case – I'll have a webserver in front of the exported folder but at the same time, I also don't want to hardcode the domain.