Re: [ot][spam][crazy] crazylog: append-only random-access data

the current written bounds are earliest where old_end >= new_start, and earliest where old_start > new_end earliest where old_end >= new_start : if this isn't off the right end, then it intersects or touches the new data. if end == start, it touches. if end > start, it overlaps, unless it is off the right end. earliest where old_start > new_end : this looks like an upper bound. it would be the first one that _doesn't_ intersect. so it produces a half-open range of mutated regions.