This situation persists until today.
I checked the old file with my backup against the new, and I get today:
# diff old-vzquota /etc/init.d/vzquota
28c28
< [ -e "$dev" ] || mknod $dev b 0 108
---
> [ -e "$dev" ] || mknod $dev b 0 72
So, this is possibly just an update of openvz made by System Administrator.
Regards,
Netino