bug #21495  Alter table from x engine to ndb and back can cause issue with drop DB:added error printout to log

bug #21495  Alter table from x engine to ndb and back can cause issue with drop DB:disable distributed drop database if a database contains local tables

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

bug#21507 I can't create a unique hash index in NDB: Added possibillity to create hash only indexes with NULL valued attributes, but any NULL valued access will become full table scan with pushed condition on index attribute values. 5.1 re-implementation

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

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

into  mysql.com:/Users/kent/mysql/bk/mysql-5.1

into  mysql.com:/Users/kent/mysql/bk/lic/my51-lic

into  mysql.com:/Users/kent/mysql/bk/lic/my50-lic

  Added --force-restart pseudo server argument to shell version as well

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  alik.:/mnt/raid/alik/MySQL/devel/5.1-rt

bug#23542  crash on DELETE from ndb dd table: uses_blob_value always reads write_set, should check read_set if read operation

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

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1-new-maint

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  mysql.com:/Users/kent/mysql/bk/lic/my51-lic

into  mysql.com:/Users/kent/mysql/bk/lic/my50-lic

into  mysql.com:/Users/kent/mysql/bk/lic/my41-lic

  Added LICENSE.mysql, removed LICENSE.doc README.NW.
  Removed obselete section about MySQLEULA.txt and README.NW.
README:
  Added reference to the EXCEPTIONS-CLIENT file.
  Changed reference to the commercial license file.
  Corrected references into chapters in the manual.
.del-MySQLEULA.txt~4a1afd9284f9be5a:
  Delete: Docs/MySQLEULA.txt

into  outpost.site:/home/cps/mysql/trees/mysql-5.1-runtime

into  mysql.com:/Users/kent/mysql/bk/mysql-5.1

bug#21507 I can't create a unique hash index in NDB: Added possibillity to create hash only indexes with NULL valued attributes, but any NULL valued access will become full table scan with pushed condition on index attribute values

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1-new-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0-maint

 - Readd --skip-bdb when valgrinding

 - Fix memory leak in vio_VioSSLFD that occurs when one of the calls to SSL_* function fails. As in the "ssl_des"
   test case where the server is currently not supposed to be able to read the specific cert/key file.
 - Change error message to be generic as it's called both from server and client code.

into  alik.:/mnt/raid/alik/MySQL/devel/5.1-rt-merged-2

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

  Make sure index scan does not commitDelete

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1-new-maint

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0-maint