• Fixes support for symlinks pointing to an empty target. Before they
  were only partially supported, and their presence could result in
  a content file not readable.
  This also disables multi threads content write, as this was the issue
  we tried to detect with this feature, and it doesn't provide a
  performance advantage. Content verification is instead still multi
  threads.
• Autorename disks using the matching UUID. To rename a disk you can
  now change directly the name in the configuration file, and run a 'sync'
  command.
• Improves the physical offset ordering for the Btrfs filesystem,
  correctly detecting files that have not a physical offset, for
  whatever reason.
• Adds UUID support to Btrfs filesystems. It's present only if the
  'libblkid' development library is available on the system.
  Usually this requires to install the libblkid-dev or libblkid-devel
  package.
• Added a new --no-warnings option to disable some repetitive warnings
  that could be annoying to power users.
• Improves the error reporting, printing a complete stack trace, that can
  be used to track down bugs more easily.
  For this reason the Windows binaries are now built with optimization
  option -Og, instead than -O2.