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