One of Hawaii’s best-known homes was sold this week. The stunning three-acre oceanfront parcel along Waimanalo Beach was made famous in the “Magnum P.I.” television series, but who might spend time there next may give it even more notoriety. The sale at 41-505 Kalanianaole Highway is shrouded in a bit of mystery, but it could involve a very famous future visitor when he’s not at the White House. The property traded hands in a sale that recorded Monday. The talk of the neighborhood so far is that the purchase is affiliated with President Barack Obama, so we looked into it....