refs #6090 fix null bytes computation

git-svn-id: file:///svn/mysql.com/mariadb-5.5.30@54899 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6090 default storage engine is tokudb

git-svn-id: file:///svn/mysql.com/mariadb-5.5.30@54900 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6090 default no engine substitution

git-svn-id: file:///svn/mysql.com/mariadb-5.5.30@54901 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6090 add tokudb to sql-bench

git-svn-id: file:///svn/mysql.com/mariadb-5.5.30@54902 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6090 add tokudb to mysql-test

git-svn-id: file:///svn/mysql.com/mariadb-5.5.30@54903 c7de825b-a66e-492c-adef-691d508d4ae1