anchor.diff:          networkmanager_vpnc
           networkmanager_openconnect
           networkmanager_pptp
  +        networkmanager_l2tp
           modemmanager
           ];
   
  
positive.code:       { source = "${networkmanager_pptp}/etc/NetworkManager/VPN/nm-pptp-service.name";
          target = "NetworkManager/VPN/nm-pptp-service.name";
        }
      ] ++ optional (cfg.appendNameservers == [] || cfg.insertNameservers == [])
             { source = overrideNameserversScript;
               target = "NetworkManager/dispatcher.d/02overridedns";
  
negative.code:         networkmanager_vpnc
          networkmanager_openconnect
          networkmanager_pptp
          networkmanager_l2tp
          modemmanager
          ];
  
  