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

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 

  Increase semaphore wait warning threshold to 240 seconds

  Improve table cardinality estimate if there are big BLOBs

  Make column names non-case-sensitive in referential constraints and put table and database names there in lower case in Windows

  Add diagnostic code to catch possible space id or page no errors in the log

  Add fault tolerance: when a log record contains nonsensical space id or page number, stop log scan there

added test case that supposedly will crash mysqld built with 2.96

This should cause fewer seeks when using replication.

fixed skip counter to do the RightThing (TM) when the user messes up.
Still do RightThing when he gets it right.

Fixed race condition when using the binary log and INSERT DELAYED which could cause the binary log to have rows that was not yet written to MyISAM tables.

Fixed bug where one got an empty set instead of a DEADLOCK error when using BDB tables.

into mysql.sashanet.com:/home/sasha/src/bk/mysql

on a signal

signal. Tested to the extent that it does not break Linux. Could not test on
Darwin because the machine was not reachable. Will push anyway - at least it
does not make things worse. Testing on Darwin is needed, however.