Fix typo in a contrib download filename

into sarvik.tfr.cafe.ee:/usr/home/tfr/BK/mysql-4.0

  Remove link to sqlscreens in the contrib section

Added mention of USE/IGNORE KEY as alias for USE/IGNORE INDEX.
Fixups references to this feature throughout manual.

  Add a warning to drop database wait if there are still open handles on a table

  Add some more safety if MySQL tries to drop a table on which there are open handles

  Try to make sure DROP DATABASE does not cause a deadlock because we now let InnoDB wait MySQL does not have open handles to tables we drop

  DROP DATABASE required that the database name is in lower case to work; put it always to lower case in innobase_drop_database

Fix for ctypes on windows
Cleanup max_queries_per_hour

  Changed C++ style comments to ANSI C style.