Add env util
Add env util

retep998/coreutils,kevgeniy/coreutils,efuquen/coreutils,kwantam/coreutils,dennis/coreutils,wimh/coreutils,bundai223/coreutils,keunwoo/coreutils,kwantam/coreutils,efuquen/coreutils,dokaptur/coreutils,beni55/coreutils,uutils/coreutils,Shir0kamii/coreutils,wimh/coreutils,retep998/coreutils,Shtong/coreutils,Shir0kamii/coreutils,keunwoo/coreutils,hexsel/coreutils,jbcrail/coreutils,hexsel/coreutils,dbrgn/coreutils,Gianbaoluo/coreutils,steveklabnik/coreutils,dbrgn/coreutils,jbcrail/coreutils,silvio/rust-coreutils,sshling/coreutils,Heather/coreutils,steveklabnik/coreutils,polapl/coreutils,tempbottle/coreutils,dennis/coreutils,silvio/rust-coreutils,filmor/coreutils,ebfe/coreutils,mauricio/coreutils,Shtong/coreutils,Arcterus/coreutils,sshling/coreutils,polapl/coreutils,uutils/coreutils,ebfe/coreutils,uutils/coreutils,mauricio/coreutils,samfoo/coreutils,dbrgn/coreutils,samfoo/coreutils,kevgeniy/coreutils,kball/coreutils,kball/coreutils,beni55/coreutils,Gianbaoluo/coreutils,bundai223/coreutils,Arcterus/coreutils,Heather/coreutils,tempbottle/coreutils,filmor/coreutils