Jim Harbaugh calls out Davis, Boone for skipping mandatory minicamp

For the voluntary portion of the offseason program, coaches can’t say anything about a player’s decision to not volunteer his services.  For the lone, three-day mandatory minicamp, it’s open season on those who choose to violate their contracts and not attend. It’s no surprise, then, that 49ers coach Jim Harbaugh opted to publicly chastise tight…