Fixed data corruption bug in query cache.
Made queries be dependent of the database in use.

  Allow equal key values in a unique secondary index if the key value contains an SQL NULL

  Add warnings to recovery in some cases where log file might be corrupt and consequently recovery can be trusted less than normally

Fix pthread_mutex_trylock on HPUX (needed for query cache).

Added info about two new Query Cache status variables.

Changed 'send_file_to_server' to use less stack (Fixed replication problem on OSF1).

instead of DO RELEASE_LOCK()

  Add better instructions on how to specify innodb_data_file_path etc.

Portability fixes.
Fixed bug in mysqlbinlog when detecting binary log version

  Cleanup

  Do less statistics calculations for tables
dict0mem.h, row0mysql.c:
  Make calculation of new statistics less frequent, because the statistics in 3.23.44 involves many random disk reads

  Do not automatically calculate new statistics when a temporary table is used by MySQL in a query. The fact that some ORDER BY queries were slow may have been explained by this unnecessary statistics calculation.

Fix compile problem in sql_cache.cc

Fixed shutdown on HPUX.
Fixed bug in query cache.

  Removed a mirror in Netherlands
manual.texi:
  Remove link to outdated mod_log_mysql

horrible bug fixed

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

  Add diagnostic code to find out why foreign key constraint creation sometimes fails

  Remove a theoretical overrun in adaptive hash index building

  Eliminate a Purify warning in a multithreaded test: the fields are not protected by a mutex, therefore they can be read uninitialized