Use tabs instead of spaces in kernel patches.

b=13397
i=adilger
i=johann

Add support for vanilla-2.6.22 kernel.

i=adilger
i=johann

 - few false BUG_ON()s fixed

i=adilger
i=johann

 - use explicit EXT3_BLOCKS_PER_GROUP() instead of blocksize-based calculation

Merged with mballoc patch.
Original patch by: johann
b=10995
i=adilger, alex

b=12876
i=adilger
i=huanghua

i=kalpak
i=johann

 - skip PAs being destroyed in normalization path
 - drop group lock in discard group preallocation path to avoid deadlock

i=kalpak
i=johann

 - bug in quota handling fixed (found with sanity-quota.sh)

b=11324
i=adilger
i=alex

Severity   : normal
Frequency  : rare
Bugzilla   : 11324
Description: LDISKFS-fs error (device sdc): ldiskfs_free_blocks
Details    : a disk corruption can cause the mballoc code to assert on a
	     double free.

Move to new ldiskfs series, formerly known as ldiskfs2.

b=12068