Bug#653929: "zpool status" reports bogus string for RAID-Z (breaks GRUB)

[Robert Millan <rmh@debian.org>]

Package: zfsutils
Version: 8.3~svn226546-6
Severity: important

e.g.

$ sudo zpool status tank3
  pool: tank3
 state: ONLINE
  scan: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        tank3       DEGRADED     0     0     0
          -0        DEGRADED     0     0     0
            ad4s2   ONLINE       0     0     0
            ad6s2   ONLINE       0     0     0
            ad4s2   UNAVAIL      0     0     0

errors: No known data errors

prints "-0" instead of the expected "raidz1-0".

This breaks grub-install / update-grub and prevents using RAID-Z as root
file system.

-- System Information:
Architecture: kfreebsd-amd64 (x86_64)

Kernel: kFreeBSD 9.0-0-686
Locale: LANG=ca_AD.UTF-8, LC_CTYPE=ca_AD.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash