They both stem from the more general meaning of hacking as looking for clever outside-the-box solutions to a problem, showing disregard to the intended/expected

They both stem from the more general meaning of hacking as looking for clever outside-the-box solutions to a problem, showing disregard to the intended/expected/typical way of going about that sort of thing. It apparently originated with this meaning in the late 50's at MIT's Tech Model Railroad Club.