These files were taken from the quotatool-1.4.1 project from

	Mike Glover <mpg4@duluoz.net>
	Johan Ekenberg <johan@ekenberg.se>

The quota support in linux has been reworked over the year. As far as I know
it went like this

-The quota support in Linux official kernel has remained the same
 API wise and supporting it was easy.
-Someone create a new scheme using different quota.user files format.
 For some reason, they did not keep the same opcode number for the
 quotactl call. This scheme was adopted by RedHat. And various
 RedHat kernel are supporting various version of this new quota system
 with some incompatibilities.

Probing the quota version inside the kernel is not supported directly
so various tests are performed to identify the proper quotactl api
to use. Some of the tests are not bulletproof. For example, RedHat
quota utilities checks for /proc/sys/fs/quota. If it exists, the utilities
assume this is the new quotactl version. Unfortunatly, recent
official linux (Linus) kernel do have this directory as well, yet
are implementing the old API.

Fun!