Fix for large objects

I have applied the following patch to remove the assumption that
xinv/xinx files are large objects. They are now all stored in
pg_largeobject, so there is no query anymore that dumps out a list of
them. Do we need to find another way to handle a large object listing
from jdbc?

Also, should we remove jbdc/postgresql now that we have org/postgresql
working?

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026