1)some fix in fsfilt_snap_ext3 and fsfilt_snap_smfs.
2)add smfs_cow.c in smfs.
3)remove snapfs in Makefile.in and configure.in

- configure script sets HAVE_LOOKUP_RAW if kernel has the feature

I haven't re-tested the AMD functionality since landing, but I did
test iozone and dbench to ensure sanity.

- b1_4 is basically the parent of HEAD, because that's the direction
  that changes flow, as strange as that sounds.  so there's a
  HEAD_BASE tag which sits on b1_4

b_cmobd_merge should not be used for any further development or testing!

  we need this becase client's timeout should be longer then inter-mds recovery may take
- few ugly hacks that allow client to reconnect with old (before failure took place) UUID
- mds_preprw() and mds_preprw() should use l_dput() instead of f_dput()
- SOCKNAL_IO_TIMEOUT has been set to 20 seconds to make discovery of
  stale connection faster
- lconf generates persisten UUIDs for LMV clients
  it each new LMV uses fresh UUID, then each recovered MDS looks like
  new client (target MDS doesn't recognize it's old because of new UUID).
  if target MDS gets restarted, then it'll find more clients in LAST_RCVD
  then it actually had

cMD_PRE_CMD_SMASH are the relevant tags.

The pre-smashing contents of HEAD will be committed by yury into b_cmd as a
merge of the two branches.  These will be stabilized on b_cmd and eventually
landed onto HEAD.

b=2094, b=3138, b=3335, b=3274, b=3293, b=2862, b=3147, b=2350, b=3313
b=3265, b=3315, b=3301, b=3325, b=3329, b=3125, b=3098

b=3284, b=3285, b=3043, b=3236, revert liblustre group changes

b=3043, b=3258, b=3219, b=2410

b=2912/2922, b=3145 too

b=3116, b=3064, b=3107, b=3122, b=1519, 2.6 kernel fixes, group lock fixes

    Superbug 2871:
    Sub-bugs fixed 2869 2870 3034 3036 3037 3035 3038 3135

b=3057, 2947, 2925, 3050, 3041, 2849, 1662

re-add things CVS mistakenly removed.

b=3058

Clean up the autoconf and automake bits:

 * now liblustre and kernel modules can be built in the same tree
	use --disable-modules, --disable-liblustre to disable those
	bits
 * 2.6 modules are now built as .ko, and lconf can deal with them
 * fixes for builddir != srcdir

b=2947, b=2543, b=1557, b=2009

 - support VPATH build (still some unclean stuff in liblustre build)

b=2867

are updated.

- Remove unused variable from b_1414

r=adilger,zab

check that CONFIG_EXT3_FS and CONFIG_EXT3_FS_XATTR are defined in
linux/config.h

r=phil

remove unused Makefile.am files from portals/include/

- Apply Oleg's patch to fix 'lctl modules' (b_cray_portals_merge damage)