[DOCS] Adds clarification ot encryption key setting (#51244)

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gchaps 2019-11-21 08:42:07 -08:00 committed by GitHub
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@ -40,6 +40,8 @@ An arbitrary string of 32 characters or more that is used to encrypt credentials
in a cookie. It is crucial that this key is not exposed to users of {kib}. By
default, a value is automatically generated in memory. If you use that default
behavior, all sessions are invalidated when {kib} restarts.
In addition, high-availability deployments of {kib} will behave unexpectedly
if this setting isn't the same for all instances of {kib}.
`xpack.security.secureCookies`::
Sets the `secure` flag of the session cookie. The default value is `false`. It