Update on deploying the tess on w3.org

After talking to our systems, they're proposing to use two alternate web
servers for the tests (some like like tests.w3.org and tests.www.org).
Additionally, we'll also have a finer control over the deployment as
well. The drawback is that they'll give it to us by the end of May.
They'll finalize the domain names within a week.

Philippe