Log Message:
libdvdread: Update to 6.1.0

libdvdread (6.1.0)
 * Introduce DVDOpen2 and DVDOpenStream2 API to provide logger context
 * fix playback of broken discs with broken ifo files
 * improve getmntent_r detection
 * fix crashes in some disc, with empty contiguous ShortAD
 * clean obsolete code