Johnny Van Zant, lead singer of Lynyrd Skynyrd, was in town Friday night playing a concert at the UCF Arena. When asked why his hometown Jaguars haven't acquired another Jacksonville legend —Tim Tebow — Van Zant was bumfuzzled.He said the Jags should have done everything in their power to sign Tebow. "They would have filled the stadium with chicks alone," Van Zant said and laughed. . . .