PATCH: remove_sta in wpa_sta_disconnect()

[Gunter Burchardt]

Hello,

In wpa_sta_disconnect() hapd->driver.remove_sta() is called and after
it STA_REMOVE is set to inform that the station should be removed. The
first one is not ok! STA_REMOVE causes to remove the sta from all
places in hostapd and kernel (hapd->driver.remove_sta() is also
called). If the station is removed from kernel before accounting stop
is sent there are no accounting information available from kernel for
the sta.

Secondly in the patch is a sanity check whether a terminate cause is
set for the sta.

regards
gunter