Acutally use the CERT parsing
Acutally use the CERT parsing

Also fix some bugs in the errors it sends back

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