Log Message:
update to smartmontools-6.4 (2015-06-04)

- Device type '-d usbprolific' for Prolific PL2571/277x USB bridges.
- SAT: Support for ATA registers returned in fixed format sense data.
- smartctl '-i' and '--identify': ATA ACS-4 and SATA 3.2 enhancements.
- smartctl '-l xerror': Support for logs with more than 255 pages.
- smartctl '-l devstat': Prints ACS-3 DSN flags.
- smartctl '-l devstat': Read via SMART command if GP log is not
  available.
- smartctl '-l scttempsts': Prints SCT SMART STATUS (ACS-4) and
  vendor specific SCT bytes.
- configure option '--with-systemdenvfile=auto' as new default.
- configure options '--disable-drivedb', '--enable-savestates'
  and '--enable-attributelog' are deprecated.
- Corresponding '--with-*' options are enhanced accordingly.
- Configure option '--with-docdir' is deprecated.
- autoconf < 2.60 and automake < 1.10 are deprecated.
  (all of the above still work but a warning is printed if used)
- HDD, SSD and USB additions to drive database.
- Linux: AACRAID fixes, SMART STATUS should work now.
- Linux: '/dev/megaraid_sas_ioctl_node' fd leak fix.
- Darwin: '-S' command implemented, '-l devstat' should work now.
- Cygwin: Compile fix.
- Windows: Device type '-d aacraid' for AACRAID controllers.
- Windows: SAT autodetection based on IOCTL_STORAGE_QUERY_PROPERTY.
- Windows installer: Fix possible loss of user PATH environment variable.