This PR adds docs for the following items: * Remote indices privileges * Remote cluster network settings * Remote cluster security settings * New privileges * New response field for RemoteInfo API List of preview pages: * [Remote indices in defining roles](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/defining-roles.html#roles-remote-indices-priv) * [Remote indices in PutRole API](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/security-api-put-role.html#security-api-put-role-request-body) * [Remote cluster server SSL settings](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/security-settings.html#_remote_cluster_server_api_key_based_model_tlsssl_settings) * [Remote cluster client SSL settings](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/security-settings.html#_remote_cluster_client_api_key_based_model_tlsssl_settings) * [Remote cluster network settings](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/modules-network.html#remote-cluster-network-settings) and [here](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/modules-network.html#common-network-settings) * [Remote cluster credentials setting](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/remote-clusters-settings.html) * [New privileges](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/security-privileges.html) * [New response field for RemoteInfo API](https://elasticsearch_98472.docs-preview.app.elstc.co/guide/en/elasticsearch/reference/master/cluster-remote-info.html#cluster-remote-info-api-response-body)
