allow 'make rpms' to pick up non standard kernel config location

r=boc

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

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

land b_size on HEAD for 1.2

Adds support for client-side write cache accounting via OST write credits
(grants).  There is not yet a "correction" algorithm for grants if they
get out of sync between the client and OST (OST can handle clients who think
they have grant but do not).  Peter had previously suggested that grants
should decay over time (faster on the clients than on the OSTs) so idle
nodes do not consume space they aren't using.

Use /proc/fs/lustre/osc/OSC*/cur_grant_bytes (and existing cur_dirty_bytes)
to check client-side cache values.

Includes lustre-side changes for lfsck support (create files with
specific objids, create specific objids on OSTs).

Also includes some changes to the testing scripts (local.sh, lov.sh, acc-sm)
so that they include a "client nid '*'" client and can be used for sanityN.sh
testing.  This has been put into the main acceptance-small.sh loop so that
sanityN.sh will be run on both single and multi-OST setups.

b=974 b=2349
r=shaver

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

fix a bug in --disable-doc handling, and add snapfs to DISTDIRS

r=phil

(i'm just committing jerrifer's work + a couple of typo fixes)

add a --disable-doc option to lustre's configure which skips .pdf doc
building (to ease rpm creation).

 - dozens and dozens of fixes for working with 2.6 kernels
 - new 2.4 kernel APIs
 - uncountable bug fixes

- remove extN/ files

- client-side I/O cache
- O_DIRECT fixes for IA64
- liblustre improvements
- various small bug fixes

* bug fixes
 - Fix ldlm_lock_match on the MDS to avoid matching remote locks (592)
 - Fix fsfilt_extN_readpage() to read a full page of directory
   entries, or fake the remainder if PAGE_SIZE != blocksize (500)
 - Avoid extra mdc_getattr() in ll_intent_lock when possible (534, 604)
 - Fix imbalanced LOV object allocation and out-of-bound access (469)
 - Most intent operations were removed, in favour of a new RPC mode
   that does a single RPC to the server and bypasses most of the VFS
 - All LDLM resource ID arrays were removed in favour of ldlm_res_id
 - Aggressively cancel local locks on DLM servers
 - mds_reint_unlink sends EA to the client if it's the last nlink.
   client uses that EA to unlink OST objects.
 - mds_reint_{rename,unlink,link} were rewritten to take ordered locks
 - recursive symlinks were fixed (440)
 - fixed NULL deref in DEBUG_REQ
 - filter_update_lastobjid no longer calls sync, which annoyed extN
 - fixed multi-client small-writes to a single file problem (445)
 - fixed mtime updates during file writes (607)
 - fixed vector writes on obdfilter causing problems when ENOSPC (670)
 - fixed bug in obd_brw_read/write() (under guise of testing 367)
 - fixed Linux OST size reporting problem (444, 656)
 - OST now updates object mtime with writes or setattr (607, 619)
 - client verifies file size before zeroing page past EOF (445)
 - OST now writes last allocated objid to disk with allocation (108)
 - LOV on echo now works (409)
 * protocol changes
 - mds_reint_unlink sends a new buffer, with the EA included.  this
   buffer is only valid if body->valid & OBD_MD_FLEASIZE, which is only
   set if a regular file was being unlinked, and it was the last link
 - use PtlGet from the target for bulk writes (315)
 - OST now updates object mtime with writes or setattr (607, 619)
 - LDLM now has a grant-time callback to revalidate locked items, if
   necessary (604)
 - Many MDS operations were reorganized to combat race conditions
* other changes
 - Merge b_intel branch (updated lprocfs code) - now at /proc/fs/lustre
 - configure check to avoid gcc version 2.96 20000731-2.96-98 (606)

 - fstat didn't correctly synchronize attributes (399)
 - server must handle lock cancellation during blocking AST prep (487)
 - bulk descriptors were free()d too soon (511)
 - fix paths in lconf, which would load incorrect modules (451, 507)
 - fix confusing lconf 'host not found' error message (386)

  --with-portals arg as the base dir for the default
* remove old config scripts and put examples in /usr/lib/lustre/examples

Use make distdir to generate a pristine source tree because we need to keep around some files that are clobbered by distclean.

have Andreas looking over my shoulder.