pkg/debug: Update comment (#704)
pkg/debug: Update comment (#704)

We already lowercase before comparing.

Fixes #447
jremond/coredns,johnbelamaric/coredns,chrisohaver/coredns,ii/coredns,miekg/coredns,ii/coredns,coredns/coredns,varyoo/coredns,yongtang/coredns,johnbelamaric/coredns,jremond/coredns,miekg/coredns