Allow to retrieve the quota itself via the provisioning api

apps/provisioning_api/lib/users.php

@@ -575,6 +575,7 @@ class Users {
 				'used' => $storage['used'],
 				'total' => $storage['total'],
 				'relative' => $storage['relative'],
+				'quota' => $storage['quota'],
 			];
 		} catch (NotFoundException $ex) {
 			$data = [];

lib/public/files/fileinfo.php

@@ -53,7 +53,7 @@ interface FileInfo {
 	 */
 	const SPACE_UNKNOWN = -2;
 	/**
-	 * @const \OCP\Files\FileInfo::SPACE_UNKNOWN Return value for unlimited space
+	 * @const \OCP\Files\FileInfo::SPACE_UNLIMITED Return value for unlimited space
 	 * @since 8.0.0
 	 */
 	const SPACE_UNLIMITED = -3;