The change is merely necessary because the port survey script uses HTTP HEAD requests to check whether a WWW site is up, but the provider of www.bbbike.de blocks HEAD requests, allowing only GET requests. So the solution is: either apply the patch below, so I won't get any warning mails by Bill anymore, or change the port survey script to check using a HTTP GET request if there was a failing HTTP HEAD request before.
State Changed From-To: open->closed committed, thanks