Billionaire Facebook founder Mark Zuckerberg has purchased more property in Hawaii, including most of a reservoir that unleashed a deadly flood 15 years ago. Property records show Zuckerberg’s Kaloko LLC bought a 110-acre (44.5-hectare) site on Kauai last month for $17 million from a company owned by the Pflueger family, the Honolulu Star-Advertiser reported. The…