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    char *Ns_DStringVarAppend(
    Ns_DString *dsPtr,
    ...
    );
The Ns_DStringVarAppend function appends a variable number of strings to an Ns_DString. The list must end with NULL.
    Ns_DString ds;
    Ns_DStringInit(&ds);
    Ns_DStringVarAppend(&ds, "foo", "bar", NULL);
    /* do something with the dstring */
    printf ("%s\n", ds.string);
    Ns_DStringFree(&ds); /* finished with dstring */