Remove "Liebscher & Partner" from the list of ISP vendors:

• The main link points to a dead site. "Coming soon" since 2013 ...
• The link to the "stuffed daemon" is also dead. Returns a 404 ...
• It did not fit in with the other entries anyway (was the only entry with an image attached).

Note: The linked image (../gifs/plueschtier-tiny.jpg) is still in the repository.