Log Message:
Changes 2.0.2:
* PostgreSQL 8.4 compatibility
* Fix - config dump was failing on string entries that were NULL
* Fix - REPAIR CONFIG could have collisions where, when we
  load a schema, one entry in sl_table already has an OID value
  that incorrectly matches a value that another update is trying to fix.
* Updated release notes to indicate that 2.0 only supports PostgreSQL 8.3+
* Change to configure.ac to allow it to run on autoconf 2.63; there was
  something unsuitable about SLONREL_VERSION processing
* Fixes to Makefile for admin guide
* Various fixes to admin guide material
* Added an extra test to Schema name test that validates that things
  can operate properly even if the DB lacks a "public" schema
* Fixed bug in tools/start_slon.sh
* Fixed pathname substitutions in a couple of altperl scripts
* Add a test which validates that the cluster schema name is valid;
  pgAdminIII allowed setting up cluster names that slonik would refuse
  to connect to.
* Revised regression tests to use SYNC/WAIT FOR EVENT instead of
  queries that try to coordinate sl_status information with rather
  less determinacy...
* Cleanup thread was generating spurious error messages due to
  misinterpreting PG return codes.  Rectified this, and added a
  test in to make sure we're exercising the logic