[DOCS] Replace X-Pack terms with attributes

docs/reference/setup/install/windows.asciidoc

@@ -79,13 +79,13 @@ part of the installation, with the option to configure a HTTPS proxy through whi
 [[msi-installer-selected-plugins]]
 image::images/msi_installer/msi_installer_selected_plugins.png[]
 
-Upon choosing to install X-Pack plugin, an additional step allows a choice of the type of X-Pack
-license to install, in addition to X-Pack Security configuration and built-in user configuration:
+Upon choosing to install {xpack} plugin, an additional step allows a choice of the type of {xpack}
+license to install, in addition to {security} configuration and built-in user configuration:
 
 [[msi-installer-xpack]]
 image::images/msi_installer/msi_installer_xpack.png[]
 
-NOTE: X-Pack includes a choice of a Trial or Basic license for 30 days. After that, you can obtain one of the
+NOTE: {xpack} includes a choice of a Trial or Basic license for 30 days. After that, you can obtain one of the
 https://www.elastic.co/subscriptions[available subscriptions] or {ref}/security-settings.html[disable Security].
 The Basic license is free and includes the https://www.elastic.co/products/x-pack/monitoring[Monitoring] extension.
 
@@ -286,43 +286,43 @@ as _properties_ within Windows Installer documentation) that can be passed to ms
 
 `XPACKLICENSE`::
 
-  When installing X-Pack plugin, the type of license to install,
+  When installing {xpack} plugin, the type of license to install,
   either `Basic` or `Trial`. Defaults to `Basic`
 
 `XPACKSECURITYENABLED`::
 
-  When installing X-Pack plugin with a `Trial` license, whether X-Pack Security should be enabled.
+  When installing {xpack} plugin with a `Trial` license, whether {security} should be enabled.
   Defaults to `true`
 
 `BOOTSTRAPPASSWORD`::
 
-  When installing X-Pack plugin with a `Trial` license and X-Pack Security enabled, the password to
+  When installing {xpack} plugin with a `Trial` license and {security} enabled, the password to
   used to bootstrap the cluster and persisted as the `bootstrap.password` setting in the keystore.
   Defaults to a randomized value.
 
 `SKIPSETTINGPASSWORDS`::
 
-  When installing X-Pack plugin with a `Trial` license and X-Pack Security enabled, whether the
+  When installing {xpack} plugin with a `Trial` license and {security} enabled, whether the
   installation should skip setting up the built-in users `elastic`, `kibana` and `logstash_system`.
   Defaults to `false`
 
 `ELASTICUSERPASSWORD`::
 
-  When installing X-Pack plugin with a `Trial` license and X-Pack Security enabled, the password
+  When installing {xpack} plugin with a `Trial` license and {security} enabled, the password
   to use for the built-in user `elastic`. Defaults to `""`
 
 `KIBANAUSERPASSWORD`::
 
-  When installing X-Pack plugin with a `Trial` license and X-Pack Security enabled, the password
+  When installing {xpack} plugin with a `Trial` license and {security} enabled, the password
   to use for the built-in user `kibana`. Defaults to `""`
 
 `LOGSTASHSYSTEMUSERPASSWORD`::
 
-  When installing X-Pack plugin with a `Trial` license and X-Pack Security enabled, the password
+  When installing {xpack} plugin with a `Trial` license and {security} enabled, the password
   to use for the built-in user `logstash_system`. Defaults to `""`
 
 To pass a value, simply append the property name and value using the format `<PROPERTYNAME>="<VALUE>"` to
-the installation command. For example, to use a different installation directory to the default one and to install https://www.elastic.co/products/x-pack[X-Pack]:
+the installation command. For example, to use a different installation directory to the default one and to install https://www.elastic.co/products/x-pack[{xpack}]:
 
 ["source","sh",subs="attributes,callouts"]
 --------------------------------------------

x-pack/docs/en/security/authentication/built-in-users.asciidoc

@@ -118,7 +118,7 @@ the `logstash.yml` configuration file:
 xpack.monitoring.elasticsearch.password: logstashpassword
 ----------------------------------------------------------
 
-If you have upgraded from an older version of elasticsearch/x-pack,
+If you have upgraded from an older version of Elasticsearch,
 the `logstash_system` user may have defaulted to _disabled_ for security reasons.
 Once the password has been changed, you can enable the user via the following API call:
 

x-pack/docs/en/security/authentication/custom-realm.asciidoc

@@ -50,7 +50,7 @@ public AuthenticationFailureHandler getAuthenticationFailureHandler() {
 ----------------------------------------------------
 +
 The `getAuthenticationFailureHandler` method is used to optionally provide a
-custom `AuthenticationFailureHandler`, which will control how X-Pack responds
+custom `AuthenticationFailureHandler`, which will control how {security} responds
 in certain authentication failure events.
 +
 [source,java]

x-pack/docs/en/security/gs-index.asciidoc

@@ -25,8 +25,8 @@ Security protects Elasticsearch clusters by:
 To prevent unauthorized access to your Elasticsearch cluster, you must have a
 way to _authenticate_ users. This simply means that you need a way to validate
 that a user is who they claim to be. For example, you have to make sure only
-the person named _Kelsey Andorra_ can sign in as the user `kandorra`. X-Pack
-Security provides a standalone authentication mechanism that enables you to
+the person named _Kelsey Andorra_ can sign in as the user `kandorra`. {security} 
+provides a standalone authentication mechanism that enables you to
 quickly password-protect your cluster. If you're already using {xpack-ref}/ldap-realm.html[LDAP],
 {xpack-ref}/active-directory-realm.html[ Active Directory], or {xpack-ref}/pki-realm.html[ PKI] to manage
 users in your organization, {security} is able to integrate with those
@@ -83,7 +83,7 @@ issues.
 
 * {xpack-ref}/ccs-clients-integrations.html[Integrations]
   shows you how to interact with an Elasticsearch cluster protected by
-  X-Pack Security.
+  {security}.
 
 * {xpack-ref}/security-reference.html[Reference]
   provides detailed information about the access privileges you can grant to

x-pack/docs/en/security/index.asciidoc

@@ -26,8 +26,8 @@ Security protects Elasticsearch clusters by:
 To prevent unauthorized access to your Elasticsearch cluster, you must have a
 way to _authenticate_ users. This simply means that you need a way to validate
 that a user is who they claim to be. For example, you have to make sure only
-the person named _Kelsey Andorra_ can sign in as the user `kandorra`. X-Pack
-Security provides a standalone authentication mechanism that enables you to
+the person named _Kelsey Andorra_ can sign in as the user `kandorra`. {security} 
+provides a standalone authentication mechanism that enables you to
 quickly password-protect your cluster. If you're already using <<ldap-realm, LDAP>>,
 <<active-directory-realm, Active Directory>>, or <<pki-realm, PKI>> to manage
 users in your organization, {security} is able to integrate with those
@@ -81,7 +81,7 @@ issues.
 
 * <<ccs-clients-integrations>>
   shows you how to interact with an Elasticsearch cluster protected by
-  X-Pack Security.
+  {security}.
 
 * <<security-reference, Reference>>
   provides detailed information about the access privileges you can grant to