fix: HttpProxyConf构造器port字段从未赋值，timeout被重复赋值

BUG-01: this.timeout = DEFAULT_PORT 应为 this.port = DEFAULT_PORT
导致port字段始终为null，代理服务器无法获取正确端口

core/src/main/java/cn/qaiu/vx/core/verticle/conf/HttpProxyConf.java

@@ -32,7 +32,7 @@ public class HttpProxyConf {
     public HttpProxyConf() {
         this.username = DEFAULT_USERNAME;
         this.password = DEFAULT_PASSWORD;
-        this.timeout = DEFAULT_PORT;
+        this.port = DEFAULT_PORT;
         this.timeout = DEFAULT_TIMEOUT;
         this.preProxyOptions = new ProxyOptions();
     }