BuildSlave: add some unit tests for 'attached'
Merge branch 'BuildSlaveAttachedTests' of git://github.com/jaredgrubb/buildbot
Increase the DB lengths for changes.comments and buildset_properties.property_value

The current 1024 char restrictions on these columns occasionally cause issues on a MySQL backend.
Merge branch 'db_lengths' of git://github.com/andrewjcg/buildbot
Add release notes.  Fixes #2367.
fix migration 023 on postgres