9cd3dd0134
Custom WireGuard mode doesn't support NAT-PMP port forwarding — peers can't connect inbound so most torrents stall. Switching to protonvpn provider with SERVER_FEATURES=p2p picks a port-forwarding-capable server and VPN_PORT_FORWARDING=on handles the NAT-PMP handshake. Up command updates qBittorrent listen port automatically when gluetun gets the port.