Document multiple repository storage paths

doc/administration/repository_storages.md

@@ -91,6 +91,9 @@ be stored via the **Application Settings** in the Admin area.
 
 ![Choose repository storage path in Admin area](img/repository_storages_admin_ui.png)
 
+Beginning with GitLab 8.13.4, multiple paths can be chosen. New projects will be
+randomly placed on one of the selected paths.
+
 [ce-4578]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4578
 [restart gitlab]: restart_gitlab.md#installations-from-source
 [reconfigure gitlab]: restart_gitlab.md#omnibus-gitlab-reconfigure

doc/api/settings.md

@@ -42,6 +42,7 @@ Example response:
    "sign_in_text" : null,
    "container_registry_token_expire_delay": 5,
    "repository_storage": "default",
+   "repository_storages": ["default"],
    "koding_enabled": false,
    "koding_url": null
 }
@@ -73,7 +74,8 @@ PUT /application/settings
 | `user_oauth_applications` | boolean | no | Allow users to register any application to use GitLab as an OAuth provider |
 | `after_sign_out_path` | string | no | Where to redirect users after logout |
 | `container_registry_token_expire_delay` | integer | no | Container Registry token duration in minutes |
-| `repository_storage` | string | no | Storage path for new projects. The value should be the name of one of the repository storage paths defined in your gitlab.yml |
+| `repository_storages` | array of strings | no | A list of names of enabled storage paths, taken from `gitlab.yml`. New projects will be created in one of these stores, chosen at random. |
+| `repository_storage` | string | no | The first entry in `repository_storages`. Deprecated, but retained for compatibility reasons |
 | `enabled_git_access_protocol` | string | no | Enabled protocols for Git access. Allowed values are: `ssh`, `http`, and `nil` to allow both protocols. |
 | `koding_enabled` | boolean | no | Enable Koding integration. Default is `false`. |
 | `koding_url` | string | yes (if `koding_enabled` is `true`) |  The Koding instance URL for integration. |