Sync with latest Instiki trunk. Changes:
1) Upgrade Rails to 1.2.3
2) Revert RedCloth to previous version (who %#$@ cares?)
3) Preserve the Rails Security fix to vendor/rails/actionpack/lib/action_controller/caching.rb from Revision 80.

lib/redcloth.rb

vendor/rails/actionmailer/CHANGELOG

vendor/rails/actionmailer/Rakefile

vendor/rails/actionmailer/lib/action_mailer/version.rb

vendor/rails/actionpack/CHANGELOG

vendor/rails/actionpack/Rakefile

vendor/rails/actionpack/lib/action_controller/base.rb

vendor/rails/actionpack/lib/action_controller/cgi_process.rb

vendor/rails/actionpack/lib/action_controller/routing.rb

vendor/rails/actionpack/lib/action_controller/test_process.rb

vendor/rails/actionpack/lib/action_pack/version.rb

vendor/rails/actionpack/test/controller/routing_test.rb

vendor/rails/actionpack/test/controller/session_management_test.rb

vendor/rails/actionpack/test/controller/test_test.rb

vendor/rails/actionwebservice/CHANGELOG

vendor/rails/actionwebservice/Rakefile

vendor/rails/actionwebservice/lib/action_web_service/version.rb

vendor/rails/activerecord/CHANGELOG

vendor/rails/activerecord/Rakefile

vendor/rails/activerecord/lib/active_record/associations.rb

vendor/rails/activerecord/lib/active_record/associations/has_many_through_association.rb

vendor/rails/activerecord/lib/active_record/base.rb

vendor/rails/activerecord/lib/active_record/fixtures.rb

vendor/rails/activerecord/lib/active_record/reflection.rb

vendor/rails/activerecord/lib/active_record/vendor/mysql.rb

vendor/rails/activerecord/lib/active_record/version.rb

vendor/rails/activerecord/test/associations/join_model_test.rb

vendor/rails/activerecord/test/fixtures/categories_ordered.yml

vendor/rails/activerecord/test/fixtures/db_definitions/db2.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/db2.sql

vendor/rails/activerecord/test/fixtures/db_definitions/firebird.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/firebird.sql

vendor/rails/activerecord/test/fixtures/db_definitions/frontbase.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/frontbase.sql

vendor/rails/activerecord/test/fixtures/db_definitions/mysql.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/mysql.sql

vendor/rails/activerecord/test/fixtures/db_definitions/openbase.sql

vendor/rails/activerecord/test/fixtures/db_definitions/oracle.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/oracle.sql

vendor/rails/activerecord/test/fixtures/db_definitions/postgresql.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/postgresql.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sqlite.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sqlite.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sqlserver.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sqlserver.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sybase.drop.sql

vendor/rails/activerecord/test/fixtures/db_definitions/sybase.sql

vendor/rails/activerecord/test/fixtures/tag.rb

vendor/rails/activerecord/test/fixtures/vertex.rb

vendor/rails/activerecord/test/pk_test.rb

vendor/rails/activesupport/CHANGELOG

vendor/rails/activesupport/Rakefile

vendor/rails/activesupport/lib/active_support/core_ext/time.rb

vendor/rails/activesupport/lib/active_support/core_ext/time/conversions.rb

vendor/rails/activesupport/lib/active_support/deprecation.rb

vendor/rails/activesupport/lib/active_support/version.rb

vendor/rails/railties/CHANGELOG

vendor/rails/railties/Rakefile

vendor/rails/railties/environments/boot.rb

vendor/rails/railties/lib/commands/console.rb

vendor/rails/railties/lib/commands/plugin.rb

vendor/rails/railties/lib/commands/process/inspector.rb

vendor/rails/railties/lib/commands/process/reaper.rb

vendor/rails/railties/lib/commands/process/spawner.rb

vendor/rails/railties/lib/commands/server.rb

vendor/rails/railties/lib/rails/version.rb

vendor/rails/railties/lib/rails_generator/generators/applications/app/app_generator.rb

vendor/rails/railties/lib/tasks/testing.rake