This change updates zconfig.sh to reference /dev/zvol/ instead
of simply /dev/. It also extends the texts to verify correct
minor device creation for import/export and module load/unload.
Native ZFS for Linux! ZFS is an advanced file system and volume manager
which was originally developed for Solaris. It has been successfully
ported to FreeBSD and now there is a functional Linux ZFS kernel port
too. The port currently includes a fully functional and stable SPA, DMU,
and ZVOL with a ZFS Posix Layer (ZPL) on the way!