PostgreSQL compatibility: the PgServer was not working properly when the setting database_to_upper was set to false.

JdbcDataSource: the methods setUrl and getUrl where added as aliases for setURL and getURL. This should solve problems with the HikariCP (Hikari connection pool).

H2 Console: when loading the schema, incorrect JDBC calls where issued, which caused the exception "Column PRECISION not found".

Transaction store: re-use transaction ids, and they are not integer and no longer long (work in progress)