* Fix for broken UDF access with MSVC on some images
(eg. Arch Linux)
* Fix for broken Joliet access on ISO9660 images and
proper Joliet support in iso.c
* scan would fail on lowercase vs mixed case dir name comparison
due to Joliet (eg. using Slackware 13.37 ISO)
* extraction would fail for 4 GB ISO9660 ISOs
* also fixes cases issue when checking for isolinux/bootmgr
* also don't restrict NTFS labels