UNetbootin needs to be able to read RockRidge ISO extension

[Katherine Rossiter]

Ubuntu's images use the RockRidge ISO extension to utilize a longer filename namespace. Windows does not natively support RR.

UNetbootin on Windows generates invalid USB images when reading from an ISO which uses RR because filenames are truncated.

e.g. (Ubuntu 9.10 Server amd64 ISO - either normal or alternative)

When the ISO is extracted onto the USB key, filenames are truncated and can't be found by the installer.

pool/main/l/linux/firewire-core-modules-2.6.31-14-generic-di_2.6.31-14.48_amd64.udeb
is truncated to
pool/main/l/linux/firewire-core-modules-2.6.31-14-generic-di_2.6.31-14.48_amd64.ud

pool/main/l/linux/pcmcia-storage-modules-2.6.31-14-generic-di_2.6.31-14.48_amd64.udeb
is truncated to
pool/main/l/linux/pcmcia-storage-modules-2.6.31-14-generic-di_2.6.31-14.48_amd64.u