std::string parseProxy(const std::string &source)
{
    std::string proxy = source;
    if(source == "SYSTEM")
        proxy = getSystemProxy();
    else if(source == "NONE")
        proxy = "";
    return proxy;
}
std::string parseProxy(const std::string &source)
{
    std::string proxy = source;
    if(source == "SYSTEM")
        proxy = getSystemProxy();
    else if(source == "NONE")
        proxy = "";
    return proxy;
}