convertquota converts old quota files
quota.group to files
aquota.group in new format currently used by 2.4.0-ac? and newer or by SuSE or Red Hat Linux 2.4 kernels on
New file format allows using quotas for 32-bit uids / gids, setting quotas for root,
accounting used space in bytes (and so allowing use of quotas in ReiserFS) and it
is also architecture independent. This format introduces Radix Tree (a simple form of tree
structure) to quota file.