Deadwood snapshot update

The tests have been updated and all run. During testing, I realized that randomly choosing an upstream server makes it a little less likely we will get a reply when an upstream server is down, so I have increased the default number of times we try contacting an upstream server before giving up from two to three.

At this point, I am almost ready for Deadwood 2.4.02. All I have to do is add that error message.