Guest names even if anonymous authentication is disabled

Currently, you can only provide guest names when anonymous authentication is enabled, but I think it would be a great feature if you would have an option to make the name mandatory when writing a comment.

As it is now, you can still click the "COMMENT ANONYMOUSLY" button and therefore don't have to enter a name, but if you disable the "anonymous authentication" feature you have no name field at all.

Let me know what you think of the idea and we can further discuss the implementation detail then.