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

into hynda.mysql.fi:/data/my/bk/mysql-4.0-quick-fixes

Added new tests to testsuite.

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

into co3064164-a.bitbike.com:/home/arjen/mysql-4.0

Add 4.0 commands to SHOW STATUS.

New HEX() function.
Final (?) cleanup of des_encrypt() / des_decrypt().
Added missing files to Makefiles.

into co3064164-a.bitbike.com:/home/arjen/mysql-4.0

added extra/mysql_install.c - will work on it in 4.0, but it does not hurt
to have it sit in 3.23 tree for now since it will eventually be backported 
to 3.23 anyway 

into co3064164-a.bitbike.com:/home/arjen/mysql-4.0

into co3064164-a.bitbike.com:/home/arjen/mysql-4.0

Fixed bug in query cache.
Cleaned up des_crypt code.