Handle all raidz types in `zpool status` output

Index: grub/util/getroot.c
===================================================================
--- grub.orig/util/getroot.c	2012-01-31 01:05:13.000000000 -0600
+++ grub/util/getroot.c	2012-01-31 01:06:53.856704000 -0600
@@ -293,6 +293,9 @@
 	    case 2:
 	      if (strcmp (name, "mirror") && !sscanf (name, "mirror-%u", &dummy)
 		  && !sscanf (name, "raidz%u", &dummy)
+		  && !sscanf (name, "raidz1-%u", &dummy)
+		  && !sscanf (name, "raidz2-%u", &dummy)
+		  && !sscanf (name, "raidz3-%u", &dummy)
 		  && !strcmp (state, "ONLINE"))
 		{
 		  if (ndevices >= devices_allocated)