修复配置extra目录临时文件名中含CONF_EXT(如 vi 的 .swp 文件)被错误加载导致报错的问题

library/think/App.php

@@ -492,7 +492,7 @@ class App
                 $dir   = CONF_PATH . $module . 'extra';
                 $files = scandir($dir);
                 foreach ($files as $file) {
-                    if (strpos($file, CONF_EXT)) {
+                    if (pathinfo($file, PATHINFO_EXTENSION) === CONF_EXT) {
                         $filename = $dir . DS . $file;
                         Config::load($filename, pathinfo($file, PATHINFO_FILENAME));
                     }