Create innodb table space if configuring with InnoDB and not using --skip-innodb
Fixes for TRUNCATE TABLE and DROP DATABASE.


Docs/manual.texi:
  Update of manual with 4.0 changes.
mysql-test/mysql-test-run.sh:
  Fixed option --mysqld
mysql-test/r/innodb.result:
  More test cases
mysql-test/r/truncate.result:
  More test cases
mysql-test/t/drop.test:
  More test cases
mysql-test/t/innodb.test:
  More test cases
mysql-test/t/truncate.test:
  More test cases
sql/gen_lex_hash.cc:
  Smaller array
sql/ha_innobase.cc:
  Create innodb table space if not using --skip-innodb
sql/lock.cc:
  Fixed wrong mutex handling in global read lock.
sql/md5.c:
  Fixed bug from merge
sql/sql_base.cc:
  cleanup
sql/sql_db.cc:
  Use new global lock functions.
  Fixed new bug that database wasn't always dropped.
sql/sql_delete.cc:
  Fixed problem with mysql_truncate() when called from restore_table
sql/sql_parse.cc:
  Fixed error message handling.
sql/sql_table.cc:
  cleanup