* BLEServer::disconnect()

* Invoke Read callback first, to make data update possible before read

* Remove partitioning comments

* Revert "Remove partitioning comments"

This reverts commit b3b03a81572d352816819cff772231ba037dc338.

* Removed partitioning comments from EEPROM example

* std::stringstream -> std::string

* Fix small issues

* Small fix 2

* Expand gitignore to cover files created by Visual Micro's Arduino IDE for Visual Studio

(cherry picked from commit d6209c79ea16a26564fe27e74e5f277160129847)

* Also ignore VS project files

(cherry picked from commit e0ec212bd41e75a3570a6098a66ee66787db58db)

Some Debugging variables were enabled at ERROR level instead of DEBUG.  Specifically `tAfter` and `tBefore`

Tidied up references to the ESP8266, and set the correct default port for the ESP32.

* Use macros for switch case labels

* Fixed spelling error in "too"

* Fix spacing

* Inline private functions that are only called once

Fix : warning: converting to non-pointer type 'int' from NULL [-Wconversion-null]
Fix : warning: unused variable 'res' [-Wunused-variable]

Added PoE-ISO and DevKit-Lipo.
For the other boards added alternative Serial (Serial1/Serial2) pins.

* Fix https://github.com/platformio/platform-espressif32/issues/186

* Drop library.json

Ignore the error about a potentially uninitialized variable
in the Azure library that will occur when compiling as a component
in ESP-IDF.

Prevents the error that is generated on free on row 186
When calling the function readValue() sometimes it gave an error on this free.

* Fix #2750

* Fixes for pull comments

* latest modifications following comments from me-no-dev

* Move SPIFFSFSImpl to .cpp file

fixes: https://github.com/espressif/arduino-esp32/issues/2685

* Update IDF to v3.2 977854975

* Update app_httpd.cpp

Fixes https://github.com/espressif/arduino-esp32/issues/2740

* Other Arduino cores uses a macro to redefine libc abs() to take any
  type, meaning abs(-3.3) == 3.3 not the normal libc result of 3.

* 1e4bf14a (#1783) replaced similar min, max macros with c++ stdlib. However
  this change includes <algorithm> after the line which defines the abs() macro.
  <algorithm> includes <cstdlib> which undefines abs() and re-defines it.

* This means abs() becomes the plain libc version again which only takes
  integers, so abs(-3.3) == 3. As reported here:
  https://github.com/espressif/esp-idf/issues/3405

This fix tries to keep in the spirit of #1783 by using libstdc++. The other
option would be to include <cstdlib> before defining the abs() macro, so it
doesn't get undef-ed again later on.

As found by @mongozmaki in https://github.com/esp8266/Arduino/pull/6035

With SSO implementation in String, StreamString::write generates wrong
strings under some circumstances.  Reason is that String::len() returns
strlen(sso_buf) if SSO=true but with newly written data
(in StreamString::write) the null-termination missing at the time len()
is called.

Furthermore, len() is called twice which is inefficient if SSO=true.

* Fix semaphores in IDF & std::string assert 

Fixes the problem of giving a mutex from a callback with the latest IDF. Also addresses an occasional assert that happens when the btc_task callback gives the semaphore and causes an assert due to both cores potentially writing m_owner concurrently.

* Restored m_owner position in wait() as requested

* Reapply assert fix and move setting m_owner in ::give() 

Revert previous revert commit and move setting of m_owner in ::give to before giving the semaphore to prevent race condition possibility.

Implemented the ability to change the ESP32s BLE device address as
according the the BLE specification. This address is used when
advertising the ESP32 over BLE.

fixes: https://github.com/espressif/arduino-esp32/issues/2758

Fixes Arduino.h redefinition errors.

I redid the ESP8266 WString library to enable small string optimization
(SSO) a while back, and think it would be helpful even on the ESP32 with
its higher memory complement.

SSO avoids lots of tiny mallocs() on the heap which cause fragmentation
by using the memory in the class object itself to store the actual
string and only mallocing() for buffers that are larger than what can
fit in thie class object.  Modern C++ std::string implementations have
this optimization as well, but since we're using Arduino strings we had
to roll our own.

* Ensure that _size is properly set in begin

* NULL check on _data assignment

* Changed _data to malloc in order to catch alloc fails