Some late patches from Jens Glaser (jens@jens.de). These upgrade the protocol

src/interfaces/jdbc/CHANGELOG

src/interfaces/jdbc/postgresql/Connection.java

src/interfaces/jdbc/postgresql/Field.java

src/interfaces/jdbc/postgresql/errors.properties

src/interfaces/jdbc/postgresql/jdbc1/ResultSet.java

src/interfaces/jdbc/postgresql/jdbc1/ResultSetMetaData.java

src/interfaces/jdbc/postgresql/jdbc2/ResultSet.java

src/interfaces/jdbc/postgresql/jdbc2/ResultSetMetaData.java