By Andrew Hay TAOS, N.M. (Reuters) -Thousands of residents of a historic Old West town in New Mexico were told to prepare for possible evacuation on Sunday as fierce winds drove the largest active U.S. wildfire through drought-parched forests. People in the west of Las Vegas, New Mexico packed bags and kept family members close after the fire burned within 5 miles (8 km) of their homes near interstate highway 25, according to local officials and fire authorities. Crews bulldozed firebreaks to the west and north of the city of 14,000 to protect ranches, rural houses and the United World College…