curl and platform universal?

So I said earlier [1] that I had seen a port with a variant +universal, which is a strategy which seems now to have been adopted by some other ports. However, I just noticed that the port where I thought I had seen that, curl, actually says "platform universal" instead of "variant universal", and I'm not sure how that works. Anyone know? [1] http://lists.macosforge.org/pipermail/macports-users/2007- February/001704.html