fix: json field tag syntax
fix: json field tag syntax

sync https://github.com/v2fly/v2ray-core/commit/ad4f41e1c0fd6096aa738004140ec9ca4f4db1bd

v2ray/v2ray-core,panzer13/v2ray-core,panzer13/v2ray-core,v2ray/v2ray-core,simpleman1984/v2ray-core,simpleman1984/v2ray-core,LiuWenJu/v2ray-core,simpleman1984/v2ray-core,LiuWenJu/v2ray-core