Does IPFS (the protocol, not an implementation) have a license?

From @doesntgolf on Fri Dec 11 2015 08:47:22 GMT+0000 (UTC)

I’m not sure if it even makes sense for protocols to be licensed, so I’m trying to understand it better. (After a quick googling I haven’t been able to determine if HTTP has a license, so I’m guessing it doesn’t. The only writing about protocol licenses I could find is this blog post.)

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