hostapd write config in DPP mode

[Vasily Sayapin]

Hello All,

During DPP exchange wpa_supplicant is updating its own config with new
credentials. In case of hostapd it prints new configurator keys to
console and user need to update hostapd.conf manually and then restart
an AP.

Any reasons why we can't update hostapd.conf automatically and restart
AP when we are signing configurator?

//Vasilii