James Rodewig 6fe8f1649b [DOCS] Include docs on permanently unreleased branches only (#51743)
Adds the ability to display docs on permanently unreleased branches,
such as `master` and `7.x`.

Also updates how the autoscaling and EQL docs are included.
Currently, these feature-flag docs would display on any unreleased
branches that contain the changes, such as 7.7.
2020-02-11 11:24:13 -05:00
..
2020-02-05 08:14:07 -05:00
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