scan.go
func (s Scan) AddUDPPorts(ports ...uint16) Scan {
	s.configUDPPorts = append(s.configUDPPorts, ports...)
	return s
}
func (s Scan) AddUDPPorts(ports ...uint16) Scan {
	s.configUDPPorts = append(s.configUDPPorts, ports...)
	return s
}
// AddUDPPorts adds UDP-only ports. Similar to using `-pU:<port1>,<port2>...`