Formulary: accept mxcl/master as synonym for Homebrew/homebrew
Formulary: accept mxcl/master as synonym for Homebrew/homebrew

Fixes Homebrew/homebrew#40171.

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