Jetty 部署 sym 如何去掉二级目录？

现在配置的完成后，访问地址是 bbs.163.com/sym,如何去掉 sym 目录，直接输入 bbs.163.com 就可以访问呢？

ngxin 代理

upstream sym {
    server 192.168.1.2:8082;
}

map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}



server {
    listen       80;
    server_name  bbs.163.com;

    location  / {  

        proxy_pass http://sym$request_uri;
        proxy_http_version 1.1;
        proxy_set_header  Host $host:$server_port;
        proxy_set_header  X-Real-IP  $remote_addr;
	proxy_redirect  off;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
    }


}

jetty 配置
start.ini

## Connector host/address to bind to
jetty.http.host=192.168.1.2

## Connector port to listen on
jetty.http.port=8082

# Monitored directory name (relative to $jetty.base)
# jetty.deploy.monitoredDir=webapps
# - OR -
# Monitored directory path (fully qualified)
jetty.deploy.monitoredPath=/www/domain/163.com/webapps

latke.properties 配置

#### Server ####
# Browser visit protocol
serverScheme=http
# Browser visit domain name
serverHost=bbs.163.com
# Browser visit port, 80 as usual, THIS IS NOT SERVER LISTEN PORT!
serverPort=80
#### Runtime Mode ####
#runtimeMode=DEVELOPMENT
runtimeMode=PRODUCTION

解决该问题
在 war 包目录下面新建一个 xml 文件，配置下面内容

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">

<Configure class="org.eclipse.jetty.webapp.WebAppContext">
  <Set name="contextPath">/</Set>
  <Set name="war">/www/domain/163.com/webapps/sym.war</Set>
</Configure>

参考如下：
http://www.eclipse.org/jetty/documentation/current/configuring-specific-webapp-deployment.html