[PATCH] Director stacking

[Rogier R. Mulhuijzen]

Hi,

I've implemented director stacking (using directors as backends in a 
director) in 3.0. Pretty much everything was already set up for it in VRT, 
only VCC needed some work, and thanks to phk's work there, it was pretty 
simple. And adding this feature made the hosts TAILQ superfluous, bonus!

https://github.com/drwilco/varnish-cache/compare/master...director-stacking

Backporting to 2.1 was a bit trickier, since VCC changed massively, but if 
you want to use it there:

https://github.com/drwilco/varnish-cache/compare/2.1...director-stacking-2.1

(For some reason github is showing tons of commits, but if you hit the 
files-changed tab, it does only show what it should.)

Cheers,

 	Doc

P.S.: Are github links like these fine, or should I also attach plain 
patch files?