Change comment, and logic on dhcpserver

Author: bill88t

ports/raspberrypi/common-hal/wifi/Radio.c

@@ -155,8 +155,11 @@ void common_hal_wifi_radio_start_station(wifi_radio_obj_t *self) {
 
 void common_hal_wifi_radio_stop_station(wifi_radio_obj_t *self) {
 
-    // <strike>This is wrong</strike> This is fine.
     cyw43_wifi_leave(&cyw43_state, CYW43_ITF_STA);
+    // This is wrong, but without this call the state of ITF_STA is still
+    // reported as CYW43_LINK_JOIN (by wifi_link_status) and CYW43_LINK_UP
+    // (by tcpip_link_status). However since ap disconnection isn't working
+    // either, this is not an issue.
     cyw43_wifi_leave(&cyw43_state, CYW43_ITF_AP);
 
     bindings_cyw43_wifi_enforce_pm();

shared/netutils/dhcpserver.c

@@ -265,9 +265,9 @@ static void dhcp_server_process(void *arg, struct udp_pcb *upcb, struct pbuf *p,
             d->lease[yi].expiry = (mp_hal_ticks_ms() + DEFAULT_LEASE_TIME_S * 1000) >> 16;
             dhcp_msg.yiaddr[3] = DHCPS_BASE_IP + yi;
             opt_write_u8(&opt, DHCP_OPT_MSG_TYPE, DHCPACK);
-            printf("DHCPS: client connected: MAC=%02x:%02x:%02x:%02x:%02x:%02x IP=%u.%u.%u.%u\n",
+            LWIP_DEBUGF(DHCP_DEBUG, ("DHCPS: client connected: MAC=%02x:%02x:%02x:%02x:%02x:%02x IP=%u.%u.%u.%u\n",
                 dhcp_msg.chaddr[0], dhcp_msg.chaddr[1], dhcp_msg.chaddr[2], dhcp_msg.chaddr[3], dhcp_msg.chaddr[4], dhcp_msg.chaddr[5],
-                dhcp_msg.yiaddr[0], dhcp_msg.yiaddr[1], dhcp_msg.yiaddr[2], dhcp_msg.yiaddr[3]);
+                dhcp_msg.yiaddr[0], dhcp_msg.yiaddr[1], dhcp_msg.yiaddr[2], dhcp_msg.yiaddr[3]));
             break;
         }