select db no longer depends on valid current db

scripts/select_db.php

@@ -6,8 +6,10 @@ $database_name = $argv[1];
 
 require 'includes.php';
 
-Bokeh_Engine::getInstance()->warmUpFiles();
+Bokeh_Engine::getInstance()
+  ->warmUpFiles()
+  ->warmUpSession();
 (new Class_Migration_UpdateConfig)->run($database_name);
 (new Class_Migration_UpdateDatabaseAfterSelectDb)->run();
 
-include './scripts/upgrade_db.php';
+include __DIR__.'/upgrade_db.php';