func (c *Config) String(key string, defaultValue string) (string, error) {
	out, ok, err := rpcout.SendOne("info-get guestinfo.%s", key)
	if err != nil {
		return "", err
	} else if !ok {
		return defaultValue, nil
	}
	return string(out), nil
}
String returns the config string in the guestinfo.* namespace
package rpcvmx
import (
	"fmt"
	"strconv"
	"github.com/sigma/vmw-guestinfo/rpcout"
)
type Config struct{}
func NewConfig() *Config {
	return &Config{}
}