add dnsutils
add dnsutils

for docker exec in docker 1.3+
skynetservices/skydns,tuannvm/skydns,zhang0137/skydns,nicescale/skydns,ZeaLoVe/skydns,smarterclayton/skydns,hw-qiaolei/skydns,andrewrothstein/skydns,no2key/skydns,yonglehou/skydns,AdoHe/skydns,weekface/skydns,vinhhrv/skydns,loveshell/skydns,netf/skydns,tonicbupt/skydns