4.1.0 (6 Sept 2016)

New Features

• Configuration and Action file schema validation. Requested in #674
  (untergeek)
• Alias filtertype! With this filter, you can select indices based on whether
  they are part of an alias. Merged in #748 (untergeek)
• Count filtertype! With this filter, you can now configure Curator to only
  keep the most recent n indices (or snapshots!). Merged in #749
  (untergeek)
• Experimental! Use environment variables in your YAML configuration files.
  This was a popular request, #697. (untergeek)

General

• New requirement! voluptuous Python schema validation module
• Requirement version bump: Now requires elasticsearch-py 2.4.0

Bug Fixes

• delete_aliases option in close action no longer results in an error
  if not all selected indices have an alias. Add test to confirm expected
  behavior. Reported in #736 (untergeek)

Documentation

• Add information to FAQ regarding indices created before Elasticsearch 1.4.
  Merged in #747