vif with hostap but need to start/stop vif independent

[Beat Meier]

Hello

I know hostap can create vif in the same config file but I really need 2 
config files
to start the interfaces individually, of course master interface is 
always on but
the second one I need to start and stop individually.
With madwifi this was no problem with mac80211 I don't have found the 
solution :-(
Is there no way to do that anymore?
If not how you can enable disable an virtual interface is hostap is 
running??

Greetings and thanks

Beat