If we have the XFS headers (at build time) we can use XFS specific ioctls
(once testing the file is on XFS) to better allocate space.

This dramatically improves performance of mysql-test-run cases as well:

e.g.
number of extents for ndb_dd_basic tablespaces and log files
BEFORE this patch: 57, 13, 212, 95, 17, 113 
WITH this patch  :  ALL 1 or 2 extents

(results are consistent over multiple runs. BEFORE always has several files
with lots of extents).

As for timing of test run:
BEFORE
ndb_dd_basic                   [ pass ]         107727
real    3m2.683s
user    0m1.360s
sys     0m1.192s

AFTER
ndb_dd_basic                   [ pass ]          70060
real    2m30.822s
user    0m1.220s
sys     0m1.404s

(results are again consistent over various runs)

similar for other tests (BEFORE and AFTER):
ndb_dd_alter                   [ pass ]         245360
ndb_dd_alter                   [ pass ]         211632

into  willster.(none):/home/stewart/Documents/MySQL/5.1/ndb-mgm-work

into  willster.(none):/home/stewart/Documents/MySQL/5.1/ndb-mgm-work

into  willster.(none):/home/stewart/Documents/MySQL/5.1/pending

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

  Make sure index scan does not commitDelete

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

into  perch.ndb.mysql.com:/home/jonas/src/51-work

abort if we ever fail to expand a Vector

nicer error message to user, along with error code to help track down the problem.

BUG#22305  	SysLogHandler not thread safe
BUG#22313  	can get duplicate log messages in cluster log

Fix all these problems with one patch. Make Logger, hence EventLogger (with a 
bit more) thread safe.

into  willster.(none):/home/stewart/Documents/MySQL/5.1/ndb-mgm-work

into  willster.(none):/home/stewart/Documents/MySQL/5.1/pending

into  trift2.:/MySQL/M51/push-5.1

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

  remove timeing dependant part of test

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

into  perch.ndb.mysql.com:/home/jonas/src/mysql-5.1-new-ndb

into  perch.ndb.mysql.com:/home/jonas/src/50-work

  Still leakage, make sure all unlinked operations are put back so they will be release
  (on failing blob operations, when AO_IgnoreError)

make the File_class::flush() method actually flush the stdio buffers.

Deadlock when running ndb_cache tests with --debug. Query cache locks on trying
to acquire lock.

into  willster.(none):/home/stewart/Documents/MySQL/5.1/bug20839

into  orca.ndb.mysql.com:/export/home/space/pekka/ndb/version/my51-tux

Bug #21072  Duplicate key error in NDB references wrong key: Re-wrote string usage to avoid valgrind warnings

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1-new-ndb

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1-new-ndb

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1

into  willster.(none):/home/stewart/Documents/MySQL/5.1/ndb

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0

Bug #21072  Duplicate key error in NDB references wrong key: Re-wrote string usage to avoid valgrind warnings

into  ymer.(none):/usr/local/mysql/mysql-5.1-new-ndb