On Monday, one time antagonists of a 50-year battle in the courts over right rights, who eventually became friends and allies, celebrated the San Luis Rey Indian Water Rights Settlement. They included representatives of the Rincon, Pala, Pauma, San Pasqual and La Jolla tribes, the City of Escondido, Vista Irrigation District and the San Luis Rey Indian Water Authority, whose chairman is Bo Mazzetti, chairman of the Rincon tribe.