paths.go
func nicPath(dcid, srvid, nicid string) string {
	return nicColPath(dcid, srvid) + slash(nicid)
}
func nicPath(dcid, srvid, nicid string) string {
	return nicColPath(dcid, srvid) + slash(nicid)
}
// nic_path returns the string   "/datacenters/<dcid>/servers/<srvid>/nics/<nicid>"