* [Mail/Relay/Setup] Added a 'Mail Relay' page to the Mail menu in Setup.  Here admins can enable or disable the built-in relay authentication.  This is useful when an environment is unfriendly to the RFC-2822 spec (e.g. In-Reply-To; using Exchange and Blackberry devices) and the built-in authentication can be replaced with Virtual Attendant behavior in Mail Filtering.
* [Mail/Setup/Usability] When setting up ticket masks, the number of possible combinations is now displayed with commas as thousands separators.  For example, 123456789 is displayed as "123,456,789".  This improves readability.
[Code Cleanup/Dashboards] Fixed an issue where configuring worklist widgets on dashboards could lead to conflicts between the view_id of the widget and the worklist chooser in the popup.
Merge branch '6.1' into 6.1.1
6.1.1-release checkpoint
* [Code Cleanup/Mail/Setup] The cardinality tester on ticket masks will now work with numbers of any length (including those bigger than PHP_MAX_INT).
* [Dashboards/Pie Charts/Subtotals] Subtotal widgets on dashboards can now be configured to display their values as a pie chart instead of a frequency table.  There are default wedge colors for up to 20 values, and they've been selected for clean visual separation as well as aesthetics.  While following a rainbow pattern, the colors begin at green rather than red, ensuring the largest wedges are one of the green-blue-violet spectrum subdued colors instead of an alarming large red block on a dashboard. A list of subtotal values is displayed below the chart.  The pie charts also have mouse interaction.  Hovering over a wedge will render a slightly transparent bumper at the edge, and it will display a highlighter style on the appropriate subtotal; making it very easy to identify which value is associated with the selected pie wedge.

* [Dashboards/Subtotals] Subtotal widgets can now limit their results to the top 3-20 subtotal categories.  This is useful when you want to build a 'Top 10' list, even though there may be extra results.
* [Social] Updated Cerb's Facebook URL.
* [CHD-3103] [Mail/Filtering] Added a 'Sender is worker' condition to Virtual Attendant behavior on the Mail Filtering event.
* [CHD-3106] [Setup/Groups] FIXED: Admins can't see the 'groups' menu in the global navigation bar unless they're the manager of at least one group.
* [CHD-3105] [Mail] Fixed an issue where the personalized 'From:' name sometimes wasn't populated on outgoing messages when using snippet placeholders.
* [Setup/CSS] Fixed a minor CSS issue in recent Chrome versions where the 'disabled' overlay banner on plugin icons wasn't properly aligned.
[Code Cleanup] Whitespace fixes
* [CHD-3124] [Mail/Message/Worklists] Message worklists may now be filtered by ticket status.  The status field can also be used in quick search and subtotals.
* [CHD-3126] [Worklists/Ticket/Subtotals] FIXED: When subtotaling a ticket worklist by Owner, clicking on '(none)' returns an error instead of filtering the list to unassigned items.
* [CHD-3129] [Knowledgebase] Fixed an issue when saving knowledgebase articles where minor latency could cause the save to be aborted and the page to reload with the previous content.  This happened most often when using Chrome.
* [CHD-3131] [Opportunities] FIXED: Deleting an opportunity from peek doesn't reload the underlying worklist.
* [CHD-3133] [Subtotals/Custom Fields] Subtotals can now be used on all 'url' and 'number' based custom fields.
6.1.2-dev checkpoint
* [CHD-3111] [Context Links] Added some extra error checking to make sure context links are only being created for valid, non-zero IDs.