System root pool is not available for windows

As per https://golang.org/src/crypto/x509/cert_pool.go looks like there
is no implementation of  `SystemCertPool` for windows platform and it
just return the error.
```
func SystemCertPool() (*CertPool, error) {
	if runtime.GOOS == "windows" {
		// Issue 16736, 18609:
		return nil, errors.New("crypto/x509: system root pool is
not available on Windows")
	}
....
```

- golang/go#16736
- golang/go#46287

main.go

@@ -57,7 +57,8 @@ func main() {
 		// Get the system certificate pools
 		caCertPool, err := x509.SystemCertPool()
 		if err != nil {
-			log.Fatalf("Not able to get system certificate pool %v", err)
+			log.Printf("Not able to get system certificate pool %v", err)
+			caCertPool = x509.NewCertPool()
 		}
 		caCert, err := ioutil.ReadFile(caCertPath)
 		if err != nil {