[DOCS] Specifies deprecated setting for 7.x (elastic#46162) (elastic#…

…47352)

docs/setup/settings.asciidoc

@@ -274,10 +274,12 @@ identifies this Kibana instance.
 `server.port:`:: *Default: 5601* Kibana is served by a back end server. This
 setting specifies the port to use.
 
-`server.rewriteBasePath:`:: *Default: false* Specifies whether Kibana should
-rewrite requests that are prefixed with `server.basePath` or require that they
-are rewritten by your reverse proxy. This setting was effectively always `false`
-before Kibana 6.3 and will default to `true` starting in Kibana 7.0.
+`server.rewriteBasePath:`:: *Default: false* Deprecated setting that specifies if Kibana should
+rewrite requests that are prefixed with `server.basePath`, or require that they
+are rewritten by your reverse proxy. 
+
+`server.socketTimeout:`:: *Default: "120000"* The number of milliseconds to wait before closing an
+inactive socket.
 
 `server.ssl.certificate:` and `server.ssl.key:`:: Paths to the PEM-format SSL
 certificate and SSL key files, respectively.