v4.0 Alpha 1 (unreleased)

Bugfix CORE-5141: Field definition allows several NOT NULL clauses
Contributor(s): Dimitry Sibiryakov
Bugfix CORE-4985: Non-privileged user can implicitly count records in a restricted table
Contributor(s): Dmitry Yemanov
Bugfix CORE-4701: Index and blob garbage collection don't take into accout data in undo log
Contributor(s): Dimitry Sibiryakov
Bugfix CORE-4424: Rollback to wrong savepoint if several exception handlers on the same level are executed
Contributor(s): Dimitry Sibiryakov
Improvement CORE-5119: Support autocommit mode in SET TRANSACTION statement
Contributor(s): Dmitry Yemanov