Colin KaepernickSan Francisco 49ers quarterback Colin Kaepernick holds the football during warmups before a preseason NFL football game against the Denver Broncos, Saturday, Aug. 20, 2016, in Denver. (AP Photo/Jack Dempsey)Here’s what the 49ers should do with Colin Kaepernick to start the regular season. He should make the team, and then be inactivated during the regular season until Kaepernick is fully ready and healthy to be the backup, or even starting quarterback. Kaepernick wasn’t traded in the off-season because no deal emerged that made sense and potential suitors were uninterested in acquiring him. Kaepernick’s contract demands apparently nixed a deal with Denver. However, one reason Kaepernick is still here is