The article didn't have a link to the GitHub project page, so here it is: https://github.com/USArmyResearchLab/Dshell
I can't even explain how frustrated I currently am by their action.
If that doesn't work, many lawyers give free consultations (AFAIK), and there's probably someone willing to take the case in exchange for X% of the settlement.
I immediately made a PR to fix it, but it was a funny and glaring omission. I just didn't realize the link was missing because I wrote it in Markdown and never looked at the rendered version.
[1] http://blog.gopheracademy.com/updating-your-go-packages-with...