More explicit about failing to parse config
More explicit about failing to parse config

% ./skydns
2015/02/26 18:20:52 skydns: failed to unmarshal config: invalid character '}' after array element

Closes #96

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