Log Message:
Update to 0.72.3.  Notable changes:

  - Blu-ray support
  - added CD raw reading and majority algorithm
  - C2 scanning support for CD media
  - changed treatment of CRC failures: old behaviour was to
    store a defective sector marker; now the actual sector
    contents are written to the image file.
  - Using the CDROM_SEND_PACKET ioctl() will hang parallel
    SCSI adapters. Added tests to determine the SCSI bus type,
    and switch to the SG_IO ioctl() when in doubt. [Linux]
  - fixed and documented -n command line options for RS02.