Method zero

src/common/buffer.cc:624–630

  }

  void buffer::ptr::zero(bool crc_reset)
  {
    if (crc_reset)
        _raw->invalidate_crc();
    // FIPS zeroization audit 20191115: this memset is not security related.
    memset(c_str(), 0, _len);
  }

  void buffer::ptr::zero(unsigned o, unsigned l, bool crc_reset)
  {