Merge remote-tracking branch 'pali/multisesssion'

Merge remote-tracking branch 'pali/multisesssion'

* pali/multisesssion:
  libblkid: udf: add support for unclosed sequential Write-Once media
  libblkid: udf: add support for multisession via session_offset hint
  libblkid: iso9660: add support for multisession via session_offset hint
  libblkid: fix blkid_probe_get_sb() to use hint offset calculation
  libblkid: allow to specify offset defined by hint for blkid_probe_get_idmag()
  libblkid: detect session_offset hint for optical discs
  libblkid: do size correction of optical discs also by last written sector
  libblkid: detect CD/DVD discs in packet writing mode
  libblkid: overwrite existing hint
  libblkid: export blkid_probe_reset_hints()
  blkid: add --hint <name>=value
  libblkid: add blkid_probe_{set,get}_hint()