feat(privatevpn): native port forwarding support (#2285)

internal/portforward/loop.go

@@ -120,6 +120,9 @@ func (l *Loop) run(runCtx context.Context, runDone chan<- struct{},
 		if updateReceived {
 			// Signal to the Update call that the service has started
 			// and if it failed to start.
+			if err != nil {
+				err = fmt.Errorf("starting port forwarding service: %w", err)
+			}
 			updateResult <- err
 		}
 	}

internal/portforward/service/settings.go

@@ -12,7 +12,7 @@ type Settings struct {
 	Enabled        *bool
 	PortForwarder  PortForwarder
 	Filepath       string
-	Interface      string // needed for PIA and ProtonVPN, tun0 for example
+	Interface      string // needed for PIA, PrivateVPN and ProtonVPN, tun0 for example
 	ServerName     string // needed for PIA
 	CanPortForward bool   // needed for PIA
 	ListeningPort  uint16