Need SSL state to be visible behind a double nginx proxy

[Rob Schultz]

Well with this setup (which i thought you were looking for from the 
first article) you can put as many frontend slices as you need which can 
support 5 IP addresses each for 5 https sites. You only need the two 
listen directives on the back end nginx to allow it to manually set the 
X_FORWARDED_PROTO so your rails will know which type of connection it 
came from.
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