Port function to get ssh cli options by running ssh binary

tools/cmd/ssh/utils_test.go

@@ -0,0 +1,17 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package ssh
+
+import (
+	"fmt"
+	"testing"
+)
+
+var _ = fmt.Print
+
+func TestGetSSHOptions(t *testing.T) {
+	m := SSHOptions()
+	if m["w"] != "local_tun[:remote_tun]" {
+		t.Fatalf("Unexpected set of SSH options: %#v", m)
+	}
+}