Enhancements

Fix a typo which cause the server to hang.
Add option to enable reload pref config on request.
Optimize codes.

base/pref.example.ini

@@ -73,6 +73,9 @@ proxy_subscription=NONE
 ;Append a proxy type string ([SS] [SSR] [VMess]) to node remark.
 append_proxy_type=false
 
+;When requesting /sub, reload this config file first.
+reload_conf_on_request=false
+
 [userinfo]
 ;Rules to extract stream data from node
 ;Format: full_match_regex|new_format_regex