letsencrypt: Fix Windows tests
letsencrypt: Fix Windows tests

Karthic-Hackintosh/caddy,tpng/caddy,cez81/caddy,evermax/caddy,yukimochi/caddy,ollie314/caddy,evermax/caddy,tw4452852/caddy,devangels/caddy,tw4452852/caddy,tgulacsi/caddy,tw4452852/caddy,tobya/caddy,tw4452852/caddy,pyed/caddy,ollie314/caddy,eiszfuchs/caddy,tpng/caddy,Karthic-Hackintosh/caddy,DenBeke/caddy,pyed/caddy,mem/caddy,buddhamagnet/caddy,hackintoshrao/caddy,mem/caddy,ollie314/caddy,hackintoshrao/caddy,Karthic-Hackintosh/caddy,elcore/caddy,mem/caddy,pyed/caddy,DenBeke/caddy,cez81/caddy,tobya/caddy,evermax/caddy,dusty/caddy,tobya/caddy,buddhamagnet/caddy,eiszfuchs/caddy,Karthic-Hackintosh/caddy,pedronasser/caddy,eiszfuchs/caddy,DenBeke/caddy,buddhamagnet/caddy,hackintoshrao/caddy,dusty/caddy,devangels/caddy,tgulacsi/caddy,evermax/caddy,pedronasser/caddy,dusty/caddy,elcore/caddy,hackintoshrao/caddy,yukimochi/caddy,mem/caddy,elcore/caddy,joshix/caddy,eiszfuchs/caddy,DenBeke/caddy,tgulacsi/caddy,pedronasser/caddy,captncraig/caddy,ollie314/caddy,cez81/caddy,dusty/caddy,pyed/caddy,buddhamagnet/caddy,tgulacsi/caddy,pedronasser/caddy,tpng/caddy,tpng/caddy,captncraig/caddy,devangels/caddy,joshix/caddy,joshix/caddy,captncraig/caddy,yukimochi/caddy,tobya/caddy