Ready to give LWN a try? With a subscription to LWN, you can stay current with what is happening in the Linux and free-software community and take advantage of subscriber-only site features. We are pleased to offer you a free trial subscription, no credit card required, so that you can see for yourself. Please, join us! It has long been said that naming things is one of the hard things to do in computer science. That may be so, but it pales in comparison to the challenge of handling usernames ...