Move most /contrib README files into SGML. Some still need conversion

or will never be converted.

contrib/vacuumlo/README.vacuumlo

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-$PostgreSQL: pgsql/contrib/vacuumlo/README.vacuumlo,v 1.5 2005/06/23 00:06:37 tgl Exp $
-
-This is a simple utility that will remove any orphaned large objects out of a
-PostgreSQL database.  An orphaned LO is considered to be any LO whose OID
-does not appear in any OID data column of the database.
-
-If you use this, you may also be interested in the lo_manage trigger in
-contrib/lo.  lo_manage is useful to try to avoid creating orphaned LOs
-in the first place.
-
-
-Compiling
---------
-
-Simply run make. A single executable "vacuumlo" is created.
-
-
-Usage
------
-
-vacuumlo [options] database [database2 ... databasen]
-
-All databases named on the command line are processed.  Available options
-include:
-
-  -v            Write a lot of progress messages
-  -n            Don't remove large objects, just show what would be done
-  -U username   Username to connect as
-  -W            Prompt for password
-  -h hostname   Database server host
-  -p port       Database server port
-
-
-Method
-------
-
-First, it builds a temporary table which contains all of the OIDs of the
-large objects in that database.
-
-It then scans through all columns in the database that are of type "oid"
-or "lo", and removes matching entries from the temporary table.
-
-The remaining entries in the temp table identify orphaned LOs.  These are
-removed.
-
-
-Notes
------
-
-I decided to place this in contrib as it needs further testing, but hopefully,
-this (or a variant of it) would make it into the backend as a "vacuum lo"
-command in a later release.
-
-Peter Mount <peter@retep.org.uk>
-http://www.retep.org.uk
-March 21 1999
-
-Committed April 10 1999 Peter