Add loot disk "parallel"

The code works, its ok to call it beta.
I created man entries only for few functions, please review if I have started it correctly.
Comments on code, style, bugs and features are welcome.
In 'normal' systems Uid is just integer that get's increased every time thread is spawned, so processes have IDs like 1,2,3,10. Those are short, clean and easy to remember.