General code cleanup.

Fixed getRow() bug (527165) in ResultSet.

ResultSet.refreshRow() implemented.

Added getIdleFor() method to Connection and MysqlLogicalHandle.

Added getTable/ColumnPrivileges() to DBMD (fixes 484502).

ResultSet: Fixed updatability (values being set to null if not updated).

Fixes for ResultSet updatability in PreparedStatement.

Added support for YEAR type (533556).

DataSources - fixed setUrl bug (511614, 525565), wrong datasource class name (532816, 528767).

Relaxed synchronization in all classes, should fix 520615 and 520393.

ResultSet.insertRow() should now detect auto_increment fields in most cases and use that value in the new row. This detection will not work in multi-valued keys, however, due to the fact that the MySQL protocol does not return this information.

Added support for BIT types (51870) to PreparedStatement.

Added identifier quoting to all DatabaseMetaData methods that need them (should fix 518108).

Fixed time zone off-by-1-hour bug in PreparedStatement (538286, 528785).

Added new types to getTypeInfo(), fixed existing types thanks to Al Davis and Kid Kalanon.

Fixed testsuite.Traversal afterLast() bug, thanks to Igor Lastric.