Roanoke’s• «Channel 27ABroadcastsROANOKE (UPJ) — A Roanoke television station which has been inactive for four months returned to the air Saturday with a new. name,, a new staff and a new image.The station, channel 27, changed its call letters from WRFT-TV to WRLU-TV. WRFT went off the air after the staff walked out, complaining of poor equipment, poor programming and, lack of public serviceprogramming.Channel 27 manager BenWest said the only resemblance between WRLU - an$\)WRPT Would be the ABC networku * • *programming. , 'msaid, WRLU has new equipment, a direct hookupwith the network- •