a second time". The bug was caused by incompatibility of
negations elimination algorithm and PS: during first statement 
execute a subtree with negation was replaced with equivalent 
subtree without NOTs.
The problem was that although this transformation was permanent, 
items of the new subtree were created in execute-local memory.
The patch adds means to check if it is the first execute of a
prepared statement, and if this is the case, to allocate items
in memory of the prepared statement.
The implementation:
- backports Item_arena from 5.0
- adds Item_arena::is_stmt_prepare(), 
  Item_arena::is_first_stmt_execute().
- deletes THD::allocate_temporary_pool_for_ps_preparing(),
  THD::free_temporary_pool_for_ps_preparing(); they
  were redundant.
and adds a few invariants:
- thd->free_list never contains junk (= freed items)
- thd->current_arena is never null. If there is no
  prepared statement, it points at the thd. 
The rest of the patch contains mainly mechanical changes and
cleanups.

into mysql.com:/home/jonas/src/mysql-4.1

into mysql.com:/usr/home/bar/mysql-4.1

into poseidon.(none):/home/tomas/mysql-4.1

into mysql.com:/home/jonas/src/mysql-4.1

  Serg's typo fix :)

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

into mysql.com:/home/mysql_src/mysql-4.1-874

as this enum is not really usable yet (as MySQL server supports only one
shutdown level), and as SHUTDOWN_DEFAULT is still left to 0, this change
should disturb no user. Later (in 4.1.4 or 4.1.5) code will be pushed to
implement graceful shutdown using this enum.

SELECT ... UNION and INSERT ... SELECT ... UNION

into poseidon.(none):/home/tomas/mysql-4.1

into serg.mylan:/usr/home/serg/Abk/mysql-4.0

  LIKE crashed mysqld for binary collations in some cases

  LIKE crashed mysqld for binary collations in some cases

into mysql.com:/home/jonas/src/mysql-4.1-ndb

  Changes for NetWare to exit the InnoDB gracefully instead of crashing the server (patch by PRam@novell.com, polished a little by Heikki Tuuri)
mysqld.cc, ha_innodb.cc:
  Changes for NetWare to exit the InnoDB gracefully instead of crashing the server (patch by PRam@novell.com, polished a little by Heikki Tuuri) 

into mysql.com:/home/jonas/src/mysql-4.1-ndb

into mysql.com:/home/jonas/src/mysql-4.1-ndb

into mysql.com:/dbdata/psergey/mysql-4.1-root

bug#4925

(old code mixed the 3 alternatives: native, [lo, hi], [hi, lo])

This fixes problem with auto increment on different byte order

(This also make adding of signed ints really simple...)

into mysql.com:/home/mysql_src/mysql-4.1-874

into mysql.com:/home/mysql_src/mysql-4.0

(specific to 4.1): don't put CLIENT_LOCAL_FILES in
CLIENT_CAPABILITIES; it would make mysql_options(CLIENT_LOCAL_FILES,0)
have no effect.

into poseidon.(none):/home/tomas/mysql-4.1

that was a forgotten '~' probably.

into hundin.mysql.fi:/home/heikki/mysql-4.0