Great hire. Finally, the 49ers have a new defensive coordinator. They just hired former head coach Steve Wilks, according to the NFL Network. Wilks will replace DeMeco Ryans, who recently became the head coach of the Houston Texans. Unlike Ryans and his predecessor, Robert Saleh, who were novices when they became defensive coordinator for the 49ers, Wilks is a veteran. He was a long-time defensive backs coach for teams such as the Chicago Bear, the San Diego Chargers and the Carolina Panthers. He also has been a defensive coordinator, an interim head coach and a head coach. He even beat…