Merge pull request #3780 from GitHubUser4234/audit_log_agent

Audit log the User-Agent

lib/private/Log/File.php

@@ -14,6 +14,7 @@
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  * @author Thomas Pulzer <t.pulzer@kniel.de>
  * @author Vincent Petry <pvince81@owncloud.com>
+ * @author Roger Szabo <roger.szabo@web.de>
  *
  * @license AGPL-3.0
  *
@@ -101,6 +102,7 @@ class File {
 		} else {
 			$user = '--';
 		}
+		$userAgent = $request->getHeader('User-Agent') ?: '--';
 		$version = $config->getValue('version', '');
 		$entry = compact(
 			'reqId',
@@ -112,6 +114,7 @@ class File {
 			'method',
 			'url',
 			'user',
+			'userAgent',
 			'version'
 		);
 		$entry = json_encode($entry);