The ending of Sunday’s Toyota Owners 400 at Richmond was marred by controversy, first with questions about a potential illegal restart by Denny Hamlin, then over the actions of Martin Truex Jr., who had dominated most of the race but slipped to fourth after a late caution and restart. After Hamlin appeared to his the gas slightly before the designated restart zone in overtime, Truex lost his spot in front of the race and then lost his cool on, well, just about everyone. “It’s a tough dynamic and a tough situation to handle, but in the end there were a lot of things that just boiled over for Ma…