* added OTA Update S3 example with a sample bin

* Update as per comments

This reverts commit 63e1daa5ea67ce0f9b89b789e4bb26672f64d32e.

Update boards files

- add roll back API to switch the running partition
- do not write the partition magic until the end to prevent booting
into partially written update

Fixes: https://github.com/espressif/arduino-esp32/issues/339

Fixes: https://github.com/espressif/arduino-esp32/issues/400

Fixes: https://github.com/espressif/arduino-esp32/issues/391

WiFiTelnetToSerial is also a test for hasClient().

Fixes: https://github.com/espressif/arduino-esp32/issues/373

This needs proper testing!
Fixes: https://github.com/espressif/arduino-esp32/issues/353

Fixes: https://github.com/espressif/arduino-esp32/issues/384

- call esp_wifi_start()
- separate tcp initialization to prepare for Ethernet
- setup dhcp addresses when using custom IP config for SoftAP

Thanks @miomir1981

* Add setNoDelay and getNoDelay to WiFiServer class

* Remote TCP disconnect not detected

* Fix possible infinite loop in the example

* Remove workaround of sockets always return -76 

Remove workaround of sockets always return -76 (because it's fixed on IDF now)
Remove delay during handshake (improving stability)

* Remove unusable mbedtls_net of context creation

* Fix bad destructor

* Compatibility with WiFiClient for HTTPClient

* Initial port from ESP8266

Changed SHA1 fingerprint by Root CA verification
Changed log system

* Remove deprecated function

Board from AI-Thinker

* add support for widora-air board

* change widora-air f_cpu error,from 400M to 240M

* Add ESP.getChipId() function to get ESP32's ChipID.

* change getChipId() to getEfuseMac()

* * Change board:Lolin32 to LOLIN32
* Update LED_BUILTIN pin for LOLIN32

* Update IDF to 65acd99

* Update platformio and arduino build paths and libs

* Update esptool binaries

Implements: https://github.com/esp8266/Arduino/pull/2883
Fixes: https://github.com/espressif/arduino-esp32/issues/313
Fixes: https://github.com/espressif/arduino-esp32/issues/344

Fixes: https://github.com/espressif/arduino-esp32/issues/329

Fixes: https://github.com/espressif/arduino-esp32/issues/343

* Add ESP.getChipId() function to get ESP32's ChipID.

* change getChipId() to getEfuseMac()

It appears that the configurations for `ck_out_edge` were inverted for `SPI_MODE2` and `SPI_MODE3`. You can check the technical reference manual on page 76, table 23 "Clock Polarity and Phase, and Corresponding SPI Register Values for SPI Master".

I've check with my oscilloscope that the current configuration is wrong and this fix corrects the issue.

fixing github url.