Add comment about flakyness in the doule cname test
Add comment about flakyness in the doule cname test

weekface/skydns,zhang0137/skydns,skynetservices/skydns,no2key/skydns,yonglehou/skydns,andrewrothstein/skydns,vinhhrv/skydns,hw-qiaolei/skydns,netf/skydns,tuannvm/skydns,tonicbupt/skydns,AdoHe/skydns,ZeaLoVe/skydns,loveshell/skydns,nicescale/skydns