versions: use the actual class name when unloading
versions: use the actual class name when unloading

And document a bit more why this hack is present.

Signed-off-by: Jack Nagel <43386ce32af96f5c56f2a88e458cb94cebee3751@gmail.com>

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