Add info about initial setting to the Deploy cluster page

Author: NataliaIvakina

modules/ROOT/pages/clustering/setup/deploy.adoc

@@ -39,18 +39,22 @@ If not specified, it defaults to one hosting in primary mode.
 | The number of initial database hostings in secondary mode.
 If not specified, it defaults to zero hostings in secondary mode.
 | xref:configuration/configuration-settings.adoc#config_initial.server.mode_constraint[`initial.server.mode_constraint`]
-|
+| Specifies the server mode - whether it can host only primary databases, only secondary databases, or both types.
+Initialized at the first DBMS startup.
+When a new server is added to the cluster, the setting is used as the default input for the `ENABLE SERVER` command; can be overriden when the command is executed.
 |xref:configuration/configuration-settings.adoc#config_initial.server.allowed_databases[`initial.server.allowed_databases`]
-|
+|List of database names allowed on this server; all others are denied.
 |xref:configuration/configuration-settings.adoc#config_initial.server.denied_databases[`initial.server.denied_databases`]
-|
+|List of database names not allowed on this server. Empty means nothing is denied.
 |xref:configuration/configuration-settings.adoc#config_initial.server.tags[`initial.server.tags`]
-|
+|A list of server tag names used by the database allocation and when configuring load balancing and replication policies.
+Initialized at the first DBMS startup and/or when a newly added server is enabled.
+The setting is used as the default input for the `ENABLE SERVER` command; can be overriden when the command is executed.
 |===
 
 Points to consider:
 
-* Any setting with the `initial` prefix is only effective on the first startup of the DBMS, except for `initial.dbms.automatically_enable_free_servers`.
+* Any setting with the `initial` prefix is effective on the first startup of the DBMS and/or when a new server is added to the cluster and has to be explixitly xref:clustering/servers.adoc#server-enabled-state[`ENABLED`].
 
 * Changing the default number of primaries and secondaries dynamically can only be done with the xref:procedures.adoc#procedure_dbms_setDefaultAllocationNumbers[`dbms.setDefaultAllocationNumbers`] procedure.
 See xref:clustering/databases.adoc#create-database[`CREATE DATABASE`] for more information.