A hacker stole 8.8 million ID records from Denmark, a country of 6 million people, and the government only found out because somebody opened a bill. These are CPR numbers, basically Denmark's version of a Social Security number. Danes need one to do their taxes or open a bank account. The way in was a tiny IT company in Odense called Pays, which had two employees on file as of July. Pays had a legit login to the national register so it could sell address checks to its clients. According to…