Small extension of documentation
Small extension of documentation

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