Fix for lower case filenames

Some small speedups

forced by the user

into tetra.spaceapes.com:/home/jcole/bk/mysql

extern "C" {

into tetra.spaceapes.com:/home/jcole/bk/mysql

clean up PostgreSQL section

Clean up 'unused argument' warnings

Add extern "C" { ... } in my_pthread.h

Fix bug in isamlog
Add argument types to function declarations.

Patches required by Gemini
Fix to properly detect if there is an active transaction in InnoDB
Fix to not lock thread structure when doing automatic rollback when thread ends
Allow -O lower_case_names=0 on UNIX

  Fixed danish SunSite mirror

Let myisamchk generate a new checksum for compressed data.
Don't unconditionally force filenames to lower case on windows.
Update mysqltest to match 4.0 source (to get some of the new bug fixes into 3.23)

into tetra.spaceapes.com:/home/jcole/bk/mysql