Geoclue connects to Google even when the wifi source is disabled

Or, specifically, it connects to the configured wifi source URL, which defaults to google.

To reproduce, in the [wifi] section"

1. Set enable=false.
2. Set url=http://0.0.0.0 (i.e., something that doesn't exist).
3. Restart geoclue and look in the logs.

You'll see an error about failing to query the location because geoclue can't connect to 0.0.0.0, even though this service should be completely disabled.