Yolk aligned with latest Ada Web Server update

When I got back from my trip to Iceland, I did a git pull on AWS and among the ~89 patches that had gone in since my departure from Denmark, a handful added some new configuration parameters. I’ve added these new parameters to Yolk, so it now requires AWS commit 30281b522ed43782c8f9e7fd1f0fd912510b48f0 in order to work. It is no longer enough to just grab the latest official AWS package from libre.adacore.com – you must use the developer version of AWS.