Allow "dns:-" tag in msg to mean dont pack this
Allow "dns:-" tag in msg to mean dont pack this

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