Update version

Update the version number sent to a client as "8.5.1". This is used by the JDBC driver as a flag to indicate we're communicating with the FoundationDB SQL layer vs a real postgres database. I'm open to other suggestions, but there still needs to be a valid version number here. 

The new fdbsql.pgsql configuration values are queried directly by the JDBC driver for database meta data values, which are passed to the client application but not otherwise used. These can be changed to better conform to reality. 

The standard_conforming_strings is another JDBC driver flag requested at various points to indicate how the Escape values (e.g. \ or '') are handled in strings. This setting (the server default) is to use the SQL standard.