Great article but I'm confused about this bit: "Jesse McReynolds, a graduate of Caltech, had finished coding a low-level network library to send IPX packets over a local-area network. The code was written based on knowledge gleaned from the source code to Quake, which had been recently open-sourced by John Carmack at id software."

Warcraft was released in 1994. Quake in 1996. Quake's code was released under the GPL in 1999. So code was Jesse McReynolds cribbing from?