Hi.  Thank you for sharing.  I actually spent a few hours TODAY just scanning this FORUM for key words "xmr-stak" combined with an array of things "cryptonight" "miningpoolhub" "getaddrinfo" and did not find very many results.  I also wasted some more time scanning google for answers, no resolve there.

I believe I also tried to switch to AEON and try to mine that with xmr, and also got the same results. 

So, as a matter of troubleshooting - my next step will be to try and use other software.  My version of xmr-stak was modified by myself and I customized my own routines, that work perfectly for the other monero pools I have tried so far.  Hopefully I overlooked something in my account setup that is rejecting my worker from attaching.