Closes: https://github.com/espressif/arduino-esp32/pull/820

When user selected HSPI with SPIClass name(HSPI) ESP was, by default,
still using VSPI ports (the ones defined in pins_arduino.h).
With this change when user selects HSPI then HSPI default ports will be
used.
If user won't specify HSPI then VSPI default ports will be used.
If user will specify SCLK, MOSI, MISO and SS with SPI.begin() then user
defined ports will be used no matter if VSPI or HSPI is selected.
With this change fe. SD library can use default HSPI ports. It was
possible to
pass HSPI SPI instance to SD lib, however even then it was using VSPI
ports which were (probably) GPIO matrixed to HSPI.

* Don't escape folders which are already arguments

* Drop "stage" suffix from @platformio dev/platform

* Sync flags with platform.txt

* Add support for custom partitions per board

* Add "-fstack-protector" to CCFLAGS

* Use real flash mode and frequency for bootloader

* Use real flash mode and frequency for bootloader

fixes: https://github.com/espressif/arduino-esp32/issues/867

Fixes: https://github.com/espressif/arduino-esp32/issues/866

* Update BLE Library

* Fix SD driver

* Update toolchain

* Update IDF to e5b2c1c

Fixes: https://github.com/espressif/arduino-esp32/issues/860

fix for https://github.com/espressif/arduino-esp32/issues/740

* little fix to WiFiSTA.cpp

Now SmartConfig works! Tested on ESP32

* little fix to WiFiSTA.cpp

Now SmartConfig works! Tested on ESP32

Fixes: https://github.com/espressif/arduino-esp32/issues/803

fixes: https://github.com/espressif/arduino-esp32/issues/613

This reduce net_would_block calls and CPU utilization

Based on http://esp32.net/images/Heltec/WIFI-LoRa-32/Heltec_WIFI-LoRa-32_DiagramPinoutFromBottom.jpg

The .build.board=xx proptery is used for generating a macro named "ARDUINO_xxx".

C macro names should never have a "-" sign.

* current: ARDUINO_NodeMCU-32S
* should be: ARDUINO_=NodeMCU_32S

* fix NodeMCU-32S .build.board property

The .build.board=xx proptery is used for generating a macro named "ARDUINO_xxx".

C macro names should never have a "-" sign.

* current: ARDUINO_NodeMCU-32S
* should be: ARDUINO_=NodeMCU_32S

* fix compiler flags to be compatible to ESP8622/Arduino

see also "fix NodeMCU-32S .build.board property" #812 (https://github.com/espressif/arduino-esp32/pull/812#issuecomment-341990261)

`-DARDUINO_BOARD={build.board}` **is missing**

* Revert "fix NodeMCU-32S .build.board property"

This reverts commit ea57b1496a2e87d3977a31a29a4cf7d63216f008.

* ArduinoOTA would stop receiving any packets if the port received a zero-length UDP packet, commonly sent by network scanners like nmap. Fixed to flush() after every call to parsePacket(), even if read length is 0.

Additionally, added length checking to fix a potential buffer overflow in parseInt().

Finally, added an end() method that stops the OTA listener and releases resources.

* Only end MDNS in end() if mdns mode is enabled.

Localized versions of Linux systems use Unicode characters in the names of standard directories like "Downloads".

use minimal partitions

* Forward client certificate to wificlient secure

* remove comment

* Update boards.txt

* Create pins_arduino.h

* Update IDF to 9274814

* Fix error in i2c and Arduino

Correct 10bit Device address handling.