Spoiled-ness priority for logistics requests and belts

[h.q.droid]

Inserters have spoiled-ness priority but they currently do not apply to belts or logistics requests. It would be helpful to add the support. For example, one may want to feed rotten bioflux to biters and make science with the good batches, but this is nearly impossible right now without each platform specifying priorities between rockets.

Also, each belt segment contains 8 stacks and inserters tend to favor one stack. That could result in some of those stacks never getting used and left to rot. Like when belting eggs in space. It could help to make inserters optionally pick up the most rotten stack.

[Kalixt]

This would be great, if bots were able to grab by spoil priority. Currently if I want to feed 4 belts 240/s with gleba science it has to go through series of inserters and chests.