I'm sorry; in fact, I wasn't so busy as I was puzzled. Files like doc/examples/join.dzn should contain valid copyright and license notices, and if they are part of documentation, their license should be GFDL-compatible. I fail to explain why you missed that.
Lets please assume best intentions, people miss things. The files are small and can be considered non-copyrightable, so please don't dismiss it so abrubtly. The examples/README also declares what the license is of the examples (AGPL).
