Now that 1.6.6 is released, we should wait some small-ish period of time (a month?) and finish clean up.
- announce end-of-maintenance on user@accumulo
- archive jira version 1.6.6
- add 1.6 documentation to the 'old documentation' page
- remove 1.6 from the "documentation" menu
- remove 1.6 from the downloads page