axfr test is flaky
axfr test is flaky

Off for now: can be turned on, but we need to up a local server
and xfr from there.

modulexcite/dns,ym/go-dns,jdef/dns,Git-Host/dns,janstk/dns,asergeyev/dns,josephyzhou/dns,flebarbe/dns,skynet/dns,hugozhu/dns,jmhodges/dns,tempbottle/dns,bragr/dns,ezoic/dns,cloudflare/dns,Psiphon-Inc/dns,skyportsystems/dns,benbearchen/dns,curtiszimmerman/dns,miekg/dns,tsenart/dns,bboreham/dns,michaelharo/dns,rolandshoemaker/dns,letsencrypt/dns,ErikDubbelboer/dns