2.0 packages being removed from avalon

[Jordan Gordeev]

Simon 'corecode' Schubert wrote:
It is really bad to keep around packages we don't build anymore, because 
they get outdated and accumulate security problems.  And we don't have 
the resources to keep building packages.

I think we should keep around what we can build for at the moment, and 
not a bit more.

DragonFly releases get outdated too, and accumulate security problems. I 
think we should delete their ISO's from our mirrors.