func getConf() ProxyConf {
	once.Do(writeConf)
	return windowsProxyConf
}
GetConf retrieves the proxy configuration from the Windows Regedit
package ieproxy
import (
	"strings"
	"sync"
	"unsafe"
	"golang.org/x/sys/windows/registry"
)
type regeditValues struct {
	ProxyServer   string
	ProxyOverride string
	ProxyEnable   uint64
	AutoConfigURL string
}
var once sync.Once
var windowsProxyConf ProxyConf