scan.go
func (s Scan) AddPorts(ports ...uint16) Scan {
	s.configPorts = append(s.configPorts, ports...)
	return s
}
func (s Scan) AddPorts(ports ...uint16) Scan {
	s.configPorts = append(s.configPorts, ports...)
	return s
}
// AddPorts appends a list of ports to the list of ports to be scanned