Update docs for Elasticsearch 5.x and 6.x support

refs #5840

diff --git a/doc/14-features.md b/doc/14-features.md
index e2fdeb591add0c6e827a211e604781e4a24f8f38..316707a3e817e23c26f56467c283ca11c3121d19 100644 (file)
--- a/doc/14-features.md
+++ b/doc/14-features.md
@@ -347,7 +347,7 @@ The check results include parsed performance data metrics if enabled.
 
 > **Note**
 >
-> Elasticsearch 5.x+ is required.
+> Elasticsearch 5.x+ is required. This feature has been tested with Elasticsearch 5.6.4 and 6.0.0.
 
 Enable the feature and restart Icinga 2.