)
	flagSet.BoolVar(
		&cfg.Discovery.BootstrapToken.UnsafeSkipCAVerification, options.TokenDiscoverySkipCAHash, false,
		"For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.",
	)
	//	discovery via kube config file flag
	flagSet.StringVar(
		&cfg.Discovery.File.KubeConfigPath, options.FileDiscovery, "",
		"For file-based discovery, a file or URL from which to load cluster information.",

        entities.put("minus", "\u2212");
        entities.put("lowast", "\u2217");
        entities.put("radic", "\u221a");
        entities.put("prop", "\u221d");
        entities.put("infin", "\u221e");
        entities.put("ang", "\u2220");
        entities.put("and", "\u2227");
        entities.put("or", "\u2228");
        entities.put("cap", "\u2229");
        entities.put("cup", "\u222a");

	// CACertHashes specifies a set of public key pins to verify
	// when token-based discovery is used. The root CA found during discovery
	// must match one of these values. Specifying an empty set disables root CA
	// pinning, which can be unsafe. Each hash is specified as "<type>:<value>",
	// where the only currently supported type is "sha256". This is a hex-encoded
	// SHA-256 hash of the Subject Public Key Info (SPKI) object in DER-encoded

	// CACertHashes specifies a set of public key pins to verify
	// when token-based discovery is used. The root CA found during discovery
	// must match one of these values. Specifying an empty set disables root CA
	// pinning, which can be unsafe. Each hash is specified as "<type>:<value>",
	// where the only currently supported type is "sha256". This is a hex-encoded
	// SHA-256 hash of the Subject Public Key Info (SPKI) object in DER-encoded

        entities.put("minus", "\u2212");
        entities.put("lowast", "\u2217");
        entities.put("radic", "\u221a");
        entities.put("prop", "\u221d");
        entities.put("infin", "\u221e");
        entities.put("ang", "\u2220");
        entities.put("and", "\u2227");
        entities.put("or", "\u2228");
        entities.put("cap", "\u2229");
        entities.put("cup", "\u222a");

	if m.MuxID == 0 {
		m.Flags.Clear(FlagPayloadIsZero)
		m.Op = OpPong
		gridLogIf(ctx, c.queueMsg(m, nil))
		return
	}
	// Single calls do not support pinging.
	if v, ok := c.inStream.Load(m.MuxID); ok {
		pong := v.ping(m.Seq)
		gridLogIf(ctx, c.queueMsg(m, &pong))
	} else {
		pong := pongMsg{NotFound: true}
		gridLogIf(ctx, c.queueMsg(m, &pong))
	}

	"notin":    "\u2209",
	"ni":       "\u220B",
	"prod":     "\u220F",
	"sum":      "\u2211",
	"minus":    "\u2212",
	"lowast":   "\u2217",
	"radic":    "\u221A",
	"prop":     "\u221D",
	"infin":    "\u221E",
	"ang":      "\u2220",
	"and":      "\u2227",
	"or":       "\u2228",
	"cap":      "\u2229",
	"cup":      "\u222A",
	"int":      "\u222B",
	"there4":   "\u2234",
	"sim":      "\u223C",