* Add ability to filter the server addresses displayed in the 'By server IP

  address' plot. Controlled by the database_update_service_addr script.

* Add new 'By region' graph which is now the default. This graph always groups

  the results by Region. The 'By node' graph now always displays a line per node

  regardless of the node selection (previously it grouped by Region when all

  nodes were selected).

* Default plot is now a configuration option. To specify a plot use the 'Hedgehog

  internal plot name' as listed in the User Guide.

* Update RSSAC report header format to match RSSC002v3 report.

* Enhancements to datafiles_create_summary script.