Mofidications to dump secondary and tertiary weigthts
  And some minor improvements

- A new flag MY_CS_CSSORT was introduced for case sensitivity.
- Item_func_regexp doesn't substiture ICASE not only
  for binary collations but for case sensitive collations as well. 

  Print a warning to the .err log if the InnoDB history list length is > 20 000 even though purge reaches the list head; this is to track corruption reported on the MySQL mailing list Nov 9, 2004
lock0lock.c:
  Let SHOW INNODB STATUS print the history list length

into mysql.com:/orca/space/pekka/ndb/version/my41

 of <parameter> IS NULL":
we must not only set Item::null_value in Item_param, but implement
Item_param::is_null() to work well with IS NULL/IS NOT NULL clauses.

  Tweak some help text.

into mysql.com:/home/dlenev/src/mysql-4.1-bg6266

into mysql.com:/home/dlenev/src/mysql-4.1-bg6439

into mysql.com:/home/cps/mysql/trees/mysql-4.1

  reverting linking ndbclisnt to mysqladmin.cc

  reverting my last fix

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

    fixed erroneous error message - set auto increment was done even if create table failed so real error message got lost behind "table not found"
    and simplified code a bit

wrong datetime values for too big argument" from 4.0 tree to 4.1 tree.

into mysql.com:/space/pekka/ndb/version/my41

  This test was moved into func_group.

properly" with main tree.

Also, Item_sum_hybrid->charset was removed as redundant,
and switched to use collation.collation instead.

into mysql.com:/home/dlenev/src/mysql-4.0-bg6439

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

into mysql.com:/space/pekka/ndb/version/my41

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

into mysql.com:/space/pekka/ndb/version/my41

the same queries.

  merge error

into poseidon.ndb.mysql.com:/home/tomas/mysql-4.1

  new file

  post-conflict-merge fix (duplicate comment)

When mysqlbinlog prints LOAD DATA INFILE, let it print the thread id. Some customer would have benefited
much from this in his recovery. All this change does is adding one commented (#) line before the LOAD DATA
command, so it is quite innocuous.