Not able to discover/browse service using service subtype

[ShrutiGunwant]

1. I have publish service with type and subtype by parsing comma separated list as (_os._udp , _windows) using
   example (https://github.com/grandcat/zeroconf/blob/master/examples/register/server.go)

2. Able to discover/browse service using (https://github.com/grandcat/zeroconf/blob/master/examples/resolv/client.go) with default type as "_os._udp"

3. But not able to discover service with the subtype.
   Provide comma separated list as (service = flag.String("service", "_os._udp, _windows", "Set the service type of the new service.")
   This gives result as "No more entries".