[libdvdnav] re-enable reading DVD serial string
[libdvdnav] fix redundant close
[libdvd] add patch for reenable serial string
Expose get_title_string and get_serial_string through DVDInputStreamNavigator
Calculate DVD unique ID using libdvd's volume label and serial string
cleanup unused HashDVD code
Merge pull request #2966 from Voyager1/uniquedvdid-use-libdvdnav

Uniquedvdid use libdvdnav