replace template function link_to_docs() with \OC_Helper::linkToDocs()

lib/base.php

@@ -181,7 +181,7 @@ class OC {
 			OC_Template::printErrorPage(
 				"Can't write into config directory!",
 				'This can usually be fixed by '
-					.'<a href="' . link_to_docs('admin-dir_permissions') . '" target="_blank">giving the webserver write access to the config directory</a>.'
+					.'<a href="' . \OC_Helper::linkToDocs('admin-dir_permissions') . '" target="_blank">giving the webserver write access to the config directory</a>.'
 			);
 		}
 	}

lib/private/setup.php

@@ -183,7 +183,7 @@ class OC_Setup {
 
 			$error = $l->t('Your web server is not yet properly setup to allow files synchronization because the WebDAV interface seems to be broken.');
 			$hint = $l->t('Please double check the <a href=\'%s\'>installation guides</a>.',
-				link_to_docs('admin-install'));
+				\OC_Helper::linkToDocs('admin-install'));
 
 			OC_Template::printErrorPage($error, $hint);
 			exit();