Patches submitted by Kris Jurka (jurka@ejurka.com) for the following bugs:

Patches submitted by Kris Jurka (jurka@ejurka.com) for the following bugs:
  - Properly drop tables in jdbc regression tests with cascade for 7.3
  - problem with Statement.execute() and executeUpdate() not clearing binds
  - problem with ResultSet not correctly handling default encoding
  - changes to correctly support show transaction isolation level in 7.3
  - changed DatabaseMetaDataTest to handle differences in FK names in 7.3
  - better fix for dynamically checking server NAME data length
  (With the fixes above the jdbc regression tests pass on jdbc2 and jdbc3
   against both a 7.2 and 7.3 server)
Patchs submitted by David Wall (d.wall@computer.org):
  - problem with getBlob when largeobject oid is null
  - improvements to BlobOutputStream
Patch submitted by Haris Peco (snpe@snpe.co.yu):
  - problem with callable statement not supporting prepared statement methods

 Modified Files:
 	jdbc/org/postgresql/Driver.java.in
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1Connection.java
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1DatabaseMetaData.java
 	jdbc/org/postgresql/jdbc1/AbstractJdbc1Statement.java
 	jdbc/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java
 	jdbc/org/postgresql/jdbc2/AbstractJdbc2Statement.java
 	jdbc/org/postgresql/jdbc2/Jdbc2ResultSet.java
 	jdbc/org/postgresql/jdbc3/Jdbc3ResultSet.java
 	jdbc/org/postgresql/largeobject/BlobOutputStream.java
 	jdbc/org/postgresql/largeobject/LargeObject.java
 	jdbc/org/postgresql/test/TestUtil.java
 	jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java
 	jdbc/org/postgresql/test/jdbc2/UpdateableResultTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/BaseDataSourceTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/ConnectionPoolTest.java
 	jdbc/org/postgresql/test/jdbc2/optional/SimpleDataSourceTest.java