rem: return deflateInit2 (strm, level, DEFLATED, MAX_WBITS, DEF_MEM_LEVEL, 0, 0);
add: return deflateInit2 (strm, level, DEFLATED, MAX_WBITS, DEF_MEM_LEVEL, 0);
context: int deflateInit (strm, level)    z_stream *strm;    int level;{    return deflateInit2 (strm, level, DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,			 0, 0);    /* To do: ignore strm->next_in if we use it as window */}