fix ftp tests on windows
fix ftp tests on windows

finfish/scrapy,pawelmhm/scrapy,starrify/scrapy,pablohoffman/scrapy,ArturGaspar/scrapy,pablohoffman/scrapy,pawelmhm/scrapy,eLRuLL/scrapy,starrify/scrapy,scrapy/scrapy,kmike/scrapy,finfish/scrapy,pawelmhm/scrapy,eLRuLL/scrapy,starrify/scrapy,eLRuLL/scrapy,scrapy/scrapy,ArturGaspar/scrapy,wujuguang/scrapy,elacuesta/scrapy,dangra/scrapy,kmike/scrapy,Ryezhang/scrapy,dangra/scrapy,ArturGaspar/scrapy,Ryezhang/scrapy,wujuguang/scrapy,elacuesta/scrapy,scrapy/scrapy,dangra/scrapy,elacuesta/scrapy,Ryezhang/scrapy,finfish/scrapy,wujuguang/scrapy,kmike/scrapy,pablohoffman/scrapy