code: func (l *Netlist) Add(cidr string) {
  	_, n, err := net.ParseCIDR(cidr)
  	if err != nil {
  		panic(err)
  	}
  	*l = append(*l, *n)
  }
docs: // Add parses a CIDR mask and appends it to the list. It panics for invalid masks and is
  // intended to be used for setting up static lists.