dhclient starts bevor wpa_supplicant has negotiated

[andib]

wpa_supplicant and dhclient seems to start at the same time after the driver connected to the access point (?). Usually wpa_supplicant establish a connection within a short time and dhclient gets an offer and all works well. But sometimes it takes a while (f.i. > 10s) until wpa_supplicant successfully negotiates (this may depend on connection quality/signal strenght) and dhclient times out I guess.

I think the correct way would be waiting until wpa_supplicant negotiates and start dhclient afterwards. I don't know if xwlan currently gets status information back from wpa_supplicant (I guess no) so this has to be implemented.