HAMMER_IOC_HISTORY_NEXT_TID
if ((hist.head.flags & HAMMER_IOC_HISTORY_NEXT_TID) == 0)
hist->head.flags &= ~HAMMER_IOC_HISTORY_NEXT_TID;
if (hist->head.flags & (HAMMER_IOC_HISTORY_NEXT_TID |
hist->head.flags |= HAMMER_IOC_HISTORY_NEXT_TID;
hist->head.flags |= HAMMER_IOC_HISTORY_NEXT_TID;
if (hist.head.flags & HAMMER_IOC_HISTORY_NEXT_TID)