By Wilton Jackson The Cornhuskers’ coach accepted a restructured contract with a string of incentives. Nebraska coach Mickey Joseph reportedly agreed to a restructured contract as the Cornhuskers’ interim coach after the program recently fired Scott Frost. A source toldSports Illustrated’s Ross Dellenger that Joseph accepted the restructured contract on staff with assurances that he would be retained if there was a head coaching change. Joseph has served as the Cornhuskers associate head coach and wide receivers coach this season. Prior to accepting the deal, Joseph had not requested the claus…