Always resolve one symlink when loading formula files
Always resolve one symlink when loading formula files

This means that tapped formula will always have the correct path, and we
can stop calling realpath everywhere.

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