pull: allow pulling from API URLs.
pull: allow pulling from API URLs.

Jenkins has started spitting these out; no idea why.

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