mysql-test/r/alter_table.result:
  new results
mysql-test/r/lowercase_table.result:
  new results
mysql-test/t/alter_table.test:
  Test of ALTER TABLE DISABLE KEYS + INSERT DELAYED
mysql-test/t/lowercase_table.test:
  Added test of alias name comparison
sql/mysql_priv.h:
  Made closed_cached_table local
sql/sql_table.cc:
  Fixed bug in ALTER TABLE DISABLE KEYS and INSERT DELAYED