support for multipath

Binary package hint: grub

There is a patch which adds support to use grub from a multipathed device. I've tested it and it works fine. Just adding this hunk of the patch is enough for the installer:

diff --git a/lib/device.c b/lib/device.c
index 04a61f6..7e35b4a 100644
--- a/lib/device.c
+++ b/lib/device.c
@@ -1119,6 +1119,8 @@ write_to_partition (char **map, int drive, int partition,
          (strncmp (dev, "/dev/cciss/", 11) == 0) ||
          (strncmp (dev, "/dev/rd/", 8) == 0))
         strcpy (dev + strlen(dev), "p");
+ else if (strncmp (dev, "/dev/mapper/mpath", 17) == 0)
+ strcpy (dev + strlen(dev), "-part");
     }
   sprintf (dev + strlen(dev), "%d", ((partition >> 16) & 0xFF) + 1);