Branch b1_6

Re-add the following patches as per Andreas' request (on rmg@):

ldiskfs/kernel_patches/patches/ext3-check-jbd-errors-2.6-sles10.patch
ldiskfs/kernel_patches/patches/ext3-external-journal-2.6.9.patch
ldiskfs/kernel_patches/patches/ext3-statfs-2.6.18.patch
lustre/kernel_patches/patches/link_notlast-susefix.patch
lustre/kernel_patches/patches/vfs_nointent-2.6-sles10.patch