Proton VPN CLI - UFW Kill Switch on Raspberry Pi, Libre Renegade and PC Ubuntu 18

Hi Shane, It can be a pain to get a vpn to work on a Raspberry Pi, Libre Renegade or Older PCs, I hadn't seen any documentation outlining how to do this with protonvpn so I thought I would make this for the 5 people on the internet that might be interested.

@tarknan: Wow.... My brain is full today - but there is SO much that can be done with so many things.... I kind of understand all of this.... but I have a huge back log of "must do projects" and not much time for "like to do projects" or "interesting to do projects".

@Life_N_Times_of_Shane_T_Hanson: I hear you, just trying to save others a little time where I can.

@tarknan: It looks good to do though. If I wasn't so busy - I'd be doing it just for the hell of it... learning things....