Per usual, I have not read the thread. But I've used pee as a veg fert for years. A cup or two in a five gallon bucket of water works wonders. Stop when flowering starts.
I would treat human shit like any shit. Compost for a couple three years and it should be fine. Most composting toilets use sawdust or leaves anyway. Let it sit long enough and it will be ready to go in the garden.
Mamma always talked about when she was a kid, the shit house tomatoes being the best they grew. For those who don't know how outhouses used to work, you would dig a hole, build a outhouse over it, then shit in it until it filled up. Then they would dig a new hole and either move the outhouse or build a new one. The tomato seeds in the shit sprouted and grew at the site of the old outhouse. My compost pile does the same thing, minus the shit.