VCSDownloadStrategy: document acceptable ref types
VCSDownloadStrategy: document acceptable ref types

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