Yes, the description in the wiki is not clear. I've got the same issue and was able to get it to work (sort of). It seems to need to point to a specific subdirectory inside of the user's home directory. It also seems to fail if you point it at an existing subdirectory...
So, for your example > http://www.laufportal.info/hcww/
you could map it to /home/hcww/(subdirectory)
Then you would see the contents of (subdirectory) at
If you mapped it to /home/hcww/laufportal.info/
it creates a subdirectory named "laufportal.info" inside of your user's (hcww) home directory!
I'm know there's a reason for how this works, but it's not very clear... Maybe someone who knows more will speak up...