service script health checks not working

I'm into day 5 of messing with Consul and it's buggy as hell. I can't get so-called service script health checks working.

This is what I'm doing:
```
# cat /tmp/test.json
{"service":
{"name": "web",
"port": 80,
"check": {
"args": ["curl", "localhost"],
"interval": "10s"
}
}
}

# consul services register /tmp/test.json
Registered service: web

# http://127.0.0.1:8500/v1/health/service/web?pretty
.... returning only "CheckID": "serfHealth", type check, but NO service health check.

# curl http://127.0.0.1:8500/v1/agent/checks?pretty
{}

# grep enable_scri /consul/config/client.hcl
enable_script_checks = true
```

Why on earth it would just silently skip health check? What kind of torturing software is this? Setting log level to trace doesn't show anything extraordinary.