Issue 487: support the MySQL "SET foreign_key_checks = 0" command

git-svn-id: http://h2database.googlecode.com/svn/trunk@4957 e6896862-9d19-0410-bfb3-e9fa5d50e656
Issue 490: support MySQL "USING BTREE" index declaration


git-svn-id: http://h2database.googlecode.com/svn/trunk@4958 e6896862-9d19-0410-bfb3-e9fa5d50e656