Move external authorization docs under admin_area

doc/administration/index.md

@@ -47,7 +47,7 @@ Learn how to install, configure, update, and maintain your GitLab instance.
 [source installations](../install/installation.md#installation-from-source).
 - [Environment variables](environment_variables.md): Supported environment variables that can be used to override their defaults values in order to configure GitLab.
 - **(Starter/Premium)** [Elasticsearch](../integration/elasticsearch.md): Enable Elasticsearch to empower GitLab's Advanced Global Search. Useful when you deal with a huge amount of data.
-- **(Premium)** [External Classification Policy Authorization](external_authorization.md)
+- **(Premium)** [External Classification Policy Authorization](../user/admin_area/settings/external_authorization.md)
 
 #### Customizing GitLab's appearance
 

doc/api/settings.md

@@ -171,7 +171,6 @@ PUT /application/settings
 | `user_oauth_applications`                | boolean          | no                                            | Allow users to register any application to use GitLab as an OAuth provider                                                                                                                                                                                                                                                                                                                                                                                |
 | `version_check_enabled`                  | boolean          | no                                            | Let GitLab inform you when an update is available.                                                                                                                                                                                                                                                                                                                                                                                                        |
 | `external_authorization_service_enabled` | boolean | no | Enable using an external authorization service for accessing projects |
-| `external_authorization_service_enabled` | boolean | no | Enable using an external authorization service for accessing projects |
 | `external_authorization_service_url` | string | no | URL to which authorization requests will be directed |
 | `external_authorization_service_default_label` | string | no | The default classification label to use when requesting authorization and no classification label has been specified on the project |
 

doc/administration/external_authorization.md → doc/user/admin_area/settings/external_authorization.md

 # External authorization service
 
- > [Introduced][ee-3709] GitLab Enterprise Edition 10.6.
+> [Introduced][ee-3709] GitLab Enterprise Edition 10.6.
 
- To provide more granular access control GitLab provides a way to check project
- authorization with an external service.
+In highly controlled environments, it may be necessary for access policy to be
+controlled by an external service that permits access based on project
+classification and user access. GitLab provides a way to check project
+authorization with an external service.
 
 When a project is accessed, a request is made to the external service with the
 user information and project classification label assigned to the project. When
 the service replies with a known response, the result is cached for 6 hours.
 
-Enabeling this feature disables all cross project features in GitLab: This is to
+Enabling this feature disables all cross project features in GitLab: This is to
 prevent performing to many requests at once to the external authorization
 service.
 

ee/app/views/admin/application_settings/_external_authorization_service_form.html.haml

@@ -11,7 +11,7 @@
         %span.help-block
           If enabled, access to projects will be validated on an external service
           using their classification label.
-          = link_to icon('question-circle'), help_page_path('#')
+          = link_to icon('question-circle'), help_page_path('user/admin_area/settings/external_authorization')
     .form-group
       = f.label :external_authorization_service_url, _('Service URL'), class: 'control-label col-sm-2'
       .col-sm-10