[deutschebahn] Link to 404 in docs

[mueller-ma]

In the docs there's a link "Haltestellendaten" which leads to deutschebahn.de, but to a 404 page.

[lsiepel]

Would be nice if you can come up with a fixed link

[mueller-ma]

I found two websites:

1. https://wiki.openstreetmap.org/w/images/c/c2/20141001_IBNR.pdf -> Trustworthy domain to link to, but the data is from 2014.
2. https://www.michaeldittrich.de/ibnr/index.php -> From 2015 and you have to download a zip file

Which one would you prefer?