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屏蔽各个搜索引擎蜘蛛ua，伪静态规则
代码如下：
if ($http_user_agent ~* (Bytespider|googlebot|soso|bing|sogou|yahoo|sohu-search|yodao|YoudaoBot|robozilla|msnbot|MJ12bot|NHN|Twiceler)){ return 403; }
