Add test for DNS cache disabling
Add test for DNS cache disabling

finfish/scrapy,finfish/scrapy,dangra/scrapy,kmike/scrapy,Parlin-Galanodel/scrapy,ArturGaspar/scrapy,Parlin-Galanodel/scrapy,pawelmhm/scrapy,ssteo/scrapy,eLRuLL/scrapy,umrashrf/scrapy,umrashrf/scrapy,wujuguang/scrapy,ssteo/scrapy,Parlin-Galanodel/scrapy,ArturGaspar/scrapy,Ryezhang/scrapy,finfish/scrapy,eLRuLL/scrapy,ArturGaspar/scrapy,elacuesta/scrapy,wujuguang/scrapy,Ryezhang/scrapy,starrify/scrapy,pablohoffman/scrapy,pablohoffman/scrapy,kmike/scrapy,umrashrf/scrapy,eLRuLL/scrapy,starrify/scrapy,starrify/scrapy,elacuesta/scrapy,Ryezhang/scrapy,elacuesta/scrapy,pawelmhm/scrapy,scrapy/scrapy,dangra/scrapy,ssteo/scrapy,scrapy/scrapy,pablohoffman/scrapy,pawelmhm/scrapy,scrapy/scrapy,wujuguang/scrapy,dangra/scrapy,kmike/scrapy