Slight change to default connection options for postgresql_active_backends postgresql_database_ratio so they are more likely to work with a default postgres setup.
Added a new plugin postgresql_active_backends_by_database which shows the active backends broken down by database.
Merge remote-tracking branch 'upstream/master'
Merge pull request #263 from unluckypixie/master

Added a new plugin "postgresql_active_backends_by_database"