Portability fixes for HPUX
Rename of CHECK_LOCK to IS_FREE_LOCK
Apply lower_case_table_names also to databases
Cleanup of describe code
Don't allow \ in database names
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