Remove nondeterministic EXPLAIN SELECT which gives on 64-bit platforms a slightly different estimate (sometimes we should study why we get different results on 64-bit and 32-bit)

  Make execution with UNIV_SYNC_DEBUG faster

  Fix a latching order violation in the previous (2003-06-15) push: could lead to a hang on the btr0sea.c semaphore

  Cleanup

  Remove still some potential hangs over the btr0sea.c semaphore

into sinisa.nasamreza.org:/mnt/work/mysql-4.0

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

  Fix a possible hang over the btr0sea.c latch

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

into mashka.mysql.fi:/home/my/mysql-4.0

into eagle.mysql.r18.ru:/home/vva/work/BUG_671/mysql-4.0

Don't set field to DEFAULT value when set to NULL

into mashka.mysql.fi:/home/my/mysql-4.0

into mashka.mysql.fi:/home/my/mysql-3.23

  CREATE TABLE ...(SELECT ...) UNION ...
  INSERT ...      (SELECT ...) UNION ...

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

   paths for the binary distributions (this will hopefully resolve the
   "file /usr/local/mysql/libexec/mysqld doesn't exist" error that many
   people are facing)

into sinisa.nasamreza.org:/mnt/work/mysql-4.0

was used with NULL value on NOT NULL column. (Bug #479)

Change optimizer to prefer key lookups before table scan
Change table scans to be done after tables with constrains on scanned table 

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

into eagle.mysql.r18.ru:/home/vva/work/BUG_479_/mysql-3.23

into gluh.mysql.r18.ru:/home/gluh/mysql-4.0.for_fix

into deer.(none):/home/hf/work/mysql-4.0.615