New global read lock code
Fixed bug in DATETIME with WHERE optimization
Made UNION code more general.


include/global.h:
  Remove warning on Linux Alpha
include/mysql_com.h:
  Move some C variables inside extern "C" block.
include/mysqld_error.h:
  New error mesages
myisam/mi_write.c:
  cleanup
mysql-test/r/select.result:
  Fix because of table lists now always has a database argument.
mysql-test/r/type_datetime.result:
  Test for bug with datetime and where optimization
mysql-test/r/union.result:
  Updated result
mysql-test/t/type_datetime.test:
  New test for datetime
mysql-test/t/union.test:
  More testing of error conditions
sql/item_sum.cc:
  Remove warnings on Linux Alpha
sql/item_sum.h:
  Cleanup
sql/lock.cc:
  Cleaned up global lock handling
sql/log_event.cc:
  Removed default arguments from declarations (not allowed in cxx)
sql/mysql_priv.h:
  New prototypes
sql/mysqld.cc:
  Fix for global locks
sql/opt_range.cc:
  Cleanup
sql/share/czech/errmsg.txt:
  New errors
sql/share/danish/errmsg.txt:
  New errors
sql/share/dutch/errmsg.txt:
  New errors
sql/share/english/errmsg.txt:
  New errors
sql/share/estonian/errmsg.txt:
  New errors
sql/share/french/errmsg.txt:
  New errors
sql/share/german/errmsg.txt:
  New errors
sql/share/greek/errmsg.txt:
  New errors
sql/share/hungarian/errmsg.txt:
  New errors
sql/share/italian/errmsg.txt:
  New errors
sql/share/japanese/errmsg.txt:
  New errors
sql/share/korean/errmsg.txt:
  New errors
sql/share/norwegian-ny/errmsg.txt:
  New errors
sql/share/norwegian/errmsg.txt:
  New errors
sql/share/polish/errmsg.txt:
  New errors
sql/share/portuguese/errmsg.txt:
  New errors
sql/share/romanian/errmsg.txt:
  New errors
sql/share/russian/errmsg.txt:
  New errors
sql/share/slovak/errmsg.txt:
  New errors
sql/share/spanish/errmsg.txt:
  New errors
sql/share/swedish/errmsg.OLD:
  New errors
sql/share/swedish/errmsg.txt:
  New errors
sql/sql_acl.cc:
  Use thd->host_or_ip
sql/sql_class.cc:
  Use new global lock code
sql/sql_class.h:
  host_or_ip
sql/sql_db.cc:
  host_or_ip
sql/sql_delete.cc:
  Use now global lock code
sql/sql_lex.h:
  Cleanup of not used states and variables
sql/sql_parse.cc:
  Use now global locks.
  Made UNION code more general.
  Change to use thd->hosts_or_ip.
  TABLE_LIST now always has 'db' set.
sql/sql_repl.cc:
  Portability fixes.
  Changed wrong usage of my_vsnprintf -> my_snprintf
sql/sql_select.cc:
  Changes for UNION
sql/sql_show.cc:
  Cleanup
sql/sql_union.cc:
  Handle 'select_result' outside of mysql_union().
sql/sql_yacc.yy:
  Fixes for union