broadcast ssid in scheduled scan

Johannes, Jouni,

I have noticed that under some circumstances wpa_supplicant initiates a 
scheduled scan with broadcast ssid. This is something our firmware can 
not do so could this be avoided? Maybe by adding a feature flag for it. 
I will look into it some more to understand the scenarios in which 
broadcast ssid is used in scheduled scan request. If you know about this 
feel free to let me know.

Regards,
Arend