merge up to RC_1_0_3_5:

work around lameness in mkkerneldoth

r=ccooper

- bug in extents fixed: it could cause tree corruption
- minor bug in extents fixed: during tree growing it could possible
  to get suboptimal size for index block

1)In migration, get rid of page and buffer of src inode(fs_flushinval_pages). 2)fix some lock problems in ext3_create_indirect

is reported at the end.

1)add clonefs check before snap delete
2)some fix about orphan list
3)initialize inode in mknod, mkdir symlink ...
4)some fix about symlinks
5)add some snapshot filter operations (listxattr, getxattr)
6)some fix about sparse files
7)fix page buffer problems in snap delete and snap_do_cow
8)adding some functions  in snapconf.
: ----------------------------------------------------------------------

- support for extents in EA
- access to extents stored in EA via ioctl

finish landing patch. (merge up to RC_1_0_3_4 of b1_0)

r=adliger

fix bug in sanity test 60 where llog_test was oopsing in insmod on ia64

        with --inode-size override for lmc and lconf
r=rread,adilger

jacob's fix which stops the spec from altering slapd.conf
( this time on HEAD for realsies )

b=2587

 * remove lustre-HOWTO from cvs/build, as it's now on a wiki page.

 * disable lustre.pdf building by default.

1 add some initial snapfs process in ext3_readsupre, 2 get rid of copy_block for reguarl file in snapfs kernel patch

   * b:1934 - fix mds_cleanup_orphans
   * r: Robert
     allocate dirent dynamicly

r=adilger
add a test case to sanity.sh for lfs find