HTTP_USER_AGENT 里有 +http://localhost 是什么浏览器

nginx 日志中有一些这样的访问：

58.217.192.54 - - [15/May/2017:12:29:20 +0800] "GET / HTTP/1.0" 200 78590 "http://192.168.1.126:8083/monitor4h3/seed/schedule/getSeed/3/task5" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11; +http://localhost" "-"
58.217.192.54 - - [15/May/2017:12:29:24 +0800] "GET /?act=login&op= HTTP/1.0" 200 32159 "http://www.fetao.com/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11; +http://localhost" "-"



是蜘蛛吗