Restores the ability of H2 in default configuration to use ssl
connections out-of-the-box.

The security property jdk.tls.legacyAlgorithms exists in newer Java
versions and its default value effectively prevents anonymous TLS
from being used. The modification is only attempted when
h2.enableAnonymousTLS is true and makes SSL server socket behaviour
during handshake more similar to that of older JREs.

Note that the setting affects all SSL server sockets on the same JVM.

Issue #156: Add support for getGeneratedKeys() when executing commands via PreparedStatement#executeBatch

revamp the selection of indexes to move the bulk of the costing into
BaseIndex.
In the process, clean it up and modify the costing so that when using a
covering index, we pick the index with the least number of columns.
Smaller indexes are faster to load, leading to lower retrieval costs.

when we can satisfy a query from an index without touching table data,
then that index should have a lower cost than an index that DOES need
to retrieve table data

OptimizerHints dropped in favor of SET FORCE_JOIN_ORDER setting, fixed join order in case of TableFilter reorderings by Parser, added more tests.