Update description of the dbms.cluster.endpoints setting

Author: NataliaIvakina

modules/ROOT/pages/configuration/configuration-settings.adoc

@@ -333,8 +333,9 @@ m|+++10m+++
 [frame="topbot", stripes=odd, grid="cols", cols="<1s,<4"]
 |===
 |Description
-a|A comma-separated list of endpoints that a server should contact in order to discover other cluster members.
-Typically, all cluster members, including the current server, must be specified in this list.
+a|A comma-separated list of endpoints which a server should contact in order to discover other cluster members.
+All cluster members hosting a `system` database primary must be specified in this list.
+However, it is typical that all cluster members, including the current server, are specified in this list.
 |Valid values
 a|A comma-separated list where each element is a socket address in the format of `hostname:port`, `hostname`, or `:port`.
 |Default value