Replace dba::select(limit => 1) by dba::selectOne

- Convert array declarations to new style

mod/xrd.php

@@ -35,7 +35,7 @@ function xrd_init(App $a)
 		$name = substr($local, 0, strpos($local, '@'));
 	}
 
-	$r = dba::select('user', array(), array('nickname' => $name), array('limit' => 1));
+	$r = dba::selectOne('user', [], ['nickname' => $name]);
 	if (!DBM::is_result($r)) {
 		killme();
 	}