Function V_strncat

----------------------------------------------------------------------------- Purpose: If COPY_ALL_CHARACTERS == max_chars_to_copy then we try to add the whole pSrc to the end of pDest, otherwise we copy only as many characters as are specified in max_chars_to_copy (or the # of characters in pSrc if thats's less). Input : *pDest - destination buffer *pSrc - string to append destBufferSize - sizeo