fix `dash` compatibility issue caused by `&>` redirect symbol
fix `dash` compatibility issue caused by `&>` redirect symbol

stweil/letsencrypt,letsencrypt/letsencrypt,DavidGarciaCat/letsencrypt,piru/letsencrypt,lmcro/letsencrypt,jtl999/certbot,goofwear/letsencrypt,VladimirTyrin/letsencrypt,thanatos/lets-encrypt-preview,lmcro/letsencrypt,xgin/letsencrypt,jtl999/certbot,thanatos/lets-encrypt-preview,twstrike/le_for_patching,brentdax/letsencrypt,sjerdo/letsencrypt,xgin/letsencrypt,TheBoegl/letsencrypt,dietsche/letsencrypt,sjerdo/letsencrypt,dietsche/letsencrypt,mrb/letsencrypt,wteiken/letsencrypt,letsencrypt/letsencrypt,goofwear/letsencrypt,martindale/letsencrypt,Sveder/letsencrypt,mrb/letsencrypt,piru/letsencrypt,martindale/letsencrypt,DavidGarciaCat/letsencrypt,bsmr-misc-forks/letsencrypt,kuba/letsencrypt,brentdax/letsencrypt,twstrike/le_for_patching,bsmr-misc-forks/letsencrypt,Sveder/letsencrypt,VladimirTyrin/letsencrypt,mitnk/letsencrypt,jsha/letsencrypt,mitnk/letsencrypt,TheBoegl/letsencrypt,wteiken/letsencrypt,kuba/letsencrypt,jsha/letsencrypt,lbeltrame/letsencrypt,stweil/letsencrypt,lbeltrame/letsencrypt