cleaner: traverse directories in postorder
cleaner: traverse directories in postorder

JCount/brew,konqui/brew,EricFromCanada/brew,claui/brew,DomT4/brew,rwhogg/brew,tonyg/homebrew,reitermarkus/brew,Homebrew/brew,mgrimes/brew,aw1621107/brew,pseudocody/brew,tonyg/homebrew,hanxue/linuxbrew,alyssais/brew,rwhogg/brew,EricFromCanada/brew,nandub/brew,alyssais/brew,reelsense/brew,DomT4/brew,vitorgalvao/brew,sjackman/homebrew,maxim-belkin/brew,vitorgalvao/brew,bfontaine/brew,staticfloat/brew,reitermarkus/brew,Homebrew/brew,mistydemeo/homebrew,reitermarkus/brew,nandub/brew,vitorgalvao/brew,palxex/brew,tonyg/homebrew,EricFromCanada/brew,palxex/brew,JCount/brew,AnastasiaSulyagina/brew,jmsundar/brew,ilovezfs/brew,MikeMcQuaid/brew,Linuxbrew/brew,muellermartin/dist,vitorgalvao/brew,AnastasiaSulyagina/brew,MikeMcQuaid/brew,staticfloat/brew,konqui/brew,DomT4/brew,toonetown/homebrew,rwhogg/brew,maxim-belkin/brew,amar-laksh/brew_sudo,jmsundar/brew,mgrimes/brew,MikeMcQuaid/brew,bfontaine/brew,zmwangx/brew,mahori/brew,amar-laksh/brew_sudo,Homebrew/brew,AnastasiaSulyagina/brew,claui/brew,alyssais/brew,MikeMcQuaid/brew,maxim-belkin/brew,nandub/brew,mistydemeo/homebrew,reelsense/brew,reelsense/brew,gregory-nisbet/brew,nandub/brew,zmwangx/brew,sjackman/homebrew,konqui/brew,Homebrew/brew,pseudocody/brew,Linuxbrew/brew,EricFromCanada/brew,aw1621107/brew,ilovezfs/brew,toonetown/homebrew,bfontaine/brew,gordonmcshane/homebrew,hanxue/linuxbrew,gordonmcshane/homebrew,gregory-nisbet/brew,mahori/brew,mahori/brew,jmsundar/brew,Linuxbrew/brew,staticfloat/brew,gordonmcshane/homebrew,zmwangx/brew,claui/brew,gregory-nisbet/brew,JCount/brew,JCount/brew,muellermartin/dist,mahori/brew,mgrimes/brew,DomT4/brew,hanxue/linuxbrew,pseudocody/brew,Linuxbrew/brew,sjackman/homebrew,amar-laksh/brew_sudo,aw1621107/brew,claui/brew,muellermartin/dist,toonetown/homebrew,konqui/brew,palxex/brew,sjackman/homebrew,mistydemeo/homebrew,reitermarkus/brew,ilovezfs/brew