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    char *Ns_EncodeUrl(
    Ns_DString *pds,
    char *data
    );
The Ns_EncodeUrl function encodes the data as URL query data and appends the encoded data to the given Ns_DString. All characters except the alphanumerics are encoded as specified in RFC1738, Uniform Resource Locators. This function can be used to append arguments to a URL as query data following a `?'.