【新增】快递物流查询接口新增v2版本，实现v1与v2版本切换使用。

CoreCms.Net.Configuration/SystemSettingConstVars.cs

@@ -612,6 +612,10 @@ namespace CoreCms.Net.Configuration
         /// <summary>
         /// 易源接口授权key
         /// </summary>
+        public const string ShowApiLogisticsVersion = "showApiLogisticsVersion";
+        /// <summary>
+        /// 易源接口授权key
+        /// </summary>
         public const string ShowApiAppid = "showApiAppid";
         /// <summary>
         /// 易源接口授权密钥