httpdns v2.1.0
rewrited by OpenResty
URL/httpdns?dn=domainname1,domainname2,...
Random sorting of analytical result and according to the ISP region decision priority
Multiple domain names can be requested at the same time,eg:
127.0.0.1:6666/httpdns?dn=www.a.com,www.b.com,www.c.com