This script is used by rawgithub.io. It allows to punish the 'abusers'. There isn't really a notion of open-source in it. I think the idea is more that if some

This script is used by rawgithub.io. It allows to punish the 'abusers'. There isn't really a notion of open-source in it. I think the idea is more that if someone is eating your bandwidth by hotlinking your jQuery.js, then you can serve them this instead.