Add config update support for hostapd

Additional fixes:

Fix putting hostapd in daemon mode which results in init taking it over
and failure to stop

Also fix security check

Bug: 5069108
Change-Id: Ie0e2f975516975d270e48c9081480d85e201251f
diff --git a/SoftapController.h b/SoftapController.h
index 7801577..317b9db 100644
--- a/SoftapController.h
+++ b/SoftapController.h
@@ -45,6 +45,7 @@
     int stopSoftap();
     bool isSoftapStarted();
     int setSoftap(int argc, char *argv[]);
+    void generatePsk(char *ssid, char *passphrase, char *psk);
     int fwReloadSoftap(int argc, char *argv[]);
     int clientsSoftap(char **retbuf);
 };