Digests and data encoding in Varnish

[Nils Goroll]

> I would simply write a vmod with digest functions somewhat like:
> 
> 	md5_hex(STRING_LIST input)
> 	sha25_base64(STRING_LIST input)
> 
> and be done with it.

Yes, for the time being that will probably be the simplest solution. If it turns
out to be worth it later, we can still make the code more generic.

So I'll write different function permutations returning things like string
encodings and int (cut-off).

Thanks, Nils