refactor: DNS

dns/transport/hosts/hosts_windows.go

@@ -0,0 +1,17 @@
+package hosts
+
+import (
+	"path/filepath"
+
+	"golang.org/x/sys/windows"
+)
+
+var DefaultPath string
+
+func init() {
+	systemDirectory, err := windows.GetSystemDirectory()
+	if err != nil {
+		systemDirectory = "C:\\Windows\\System32"
+	}
+	DefaultPath = filepath.Join(systemDirectory, "Drivers/etc/hosts")
+}