Update IDF to aaf1239 (#1539)

* fix sdmmc config

* Fix warnings in EEPROM

from @Curclamas

* remove leftover TAG in EEPROM

* Initial add of @stickbreaker i2c

* Add log_n

* fix warnings when log is off

* i2c code clean up and reorganization

* add flags to interrupt allocator

* fix sdmmc config

* Fix warnings in EEPROM

from @Curclamas

* remove leftover TAG in EEPROM

* fix errors with latest IDF

* fix debug optimization (#1365)

incorrect optimization for debugging tick markers.

* Fix some missing BT header

* Change BTSerial log calls

* Update BLE lib

* Arduino-ESP32 release management scripted (#1515)

* Calculate an absolute path for a custom partitions table (#1452)

* * Arduino-ESP32 release management scripted
(ready-to-merge)

* * secure env for espressif/arduino-esp32

* * build tests enabled
* gitter webhook enabled

* * gitter room link fixed
* better comment

* * filepaths fixed

* BT Serial adjustments

* * don't run sketch builds & tests for tagged builds

* Return false from WiFi.hostByName() if hostname is not resolved

* Free BT Memory when BT is not used

* WIFI_MODE_NULL is not supported anymore

* Select some key examples to build with PlatformIO to save some time

* Update BLE lib

* Fixed BLE lib

* Major WiFi overhaul

- auto reconnect on connection loss now works
- moved to event groups
- some code clean up and procedure optimizations
- new methods to get a more elaborate system ststus

* Add cmake tests to travis

* Add initial AsyncUDP

* Add NetBIOS lib and fix CMake includes

* Add Initial WebServer

* Fix WebServer and examples

* travis not quiting on build fail

* Try different travis build

* Update IDF to aaf1239

* Fix WPS Example

* fix script permission and add some fail tests to sketch builder

* Add missing space in WiFiClient::write(Stream &stream)

tools/sdk/include/lwip/apps/dhcpserver.h

@@ -70,6 +70,8 @@ typedef struct {
         dhcps_lease_t dhcps_poll;
 } dhcps_options_t;
 
+typedef void (*dhcps_cb_t)(u8_t client_ip[4]);
+
 static inline bool dhcps_router_enabled (dhcps_offer_t offer) 
 {
     return (offer & OFFER_ROUTER) != 0;
@@ -87,6 +89,7 @@ void dhcps_set_option_info(u8_t op_id, void *opt_info, u32_t opt_len);
 bool dhcp_search_ip_on_mac(u8_t *mac, ip4_addr_t *ip);
 void dhcps_dns_setserver(const ip_addr_t *dnsserver);
 ip4_addr_t dhcps_dns_getserver();
+void dhcps_set_new_lease_cb(dhcps_cb_t cb);
 
 #endif