Function escape

native/thirdpart/json/json.hpp:10937–10942

escape "~" to "~0" and "/" to "~1"

    /// escape "~" to "~0" and "/" to "~1"
    static std::string escape(std::string s)
    {
        replace_substring(s, "~", "~0");
        replace_substring(s, "/", "~1");
        return s;
    }

    /// unescape "~1" to tilde and "~0" to slash (order is important!)
    static void unescape(std::string& s)