Fix error output in nfsd collector. (#821)
Fix error output in nfsd collector. (#821)


derekmarcotte/node_exporter,derekmarcotte/node_exporter,siavashs/node_exporter,derekmarcotte/node_exporter,prometheus/node_exporter,siavashs/node_exporter,prometheus/node_exporter,derekmarcotte/node_exporter,prometheus/node_exporter,siavashs/node_exporter,siavashs/node_exporter