allow uppercase variables for du
allow uppercase variables for du

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