[dnsdist] server policy to failover to another pool

[Justin Valentini]

Hi,

Thanks for the advice Chris and Pieter!

I tried the orderedLeastOutstanding policy but ran into issues when 
testing. If I explicitly set my order #1 server to down (e.g. 
getServer(0):setDown()) dnsdist doesn't not directly traffic to the next 
ordered server. Instead the query times out. However, when we bring down 
the actual dns server and let dnsdist healthcheck it to down, it seems 
to work.

Do any of you know why this may be the case? Do isUp() and upStatus not 
respect explicitly set DOWN state?

Thanks,
Justin