Changed logic around reserving wire read buffer
Changed logic around reserving wire read buffer

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