* master:
app_main: Return type to void
wifi: move type definitions into separate header file
wifi: use default esp_event_send handler in WIFI_INIT_CONFIG_DEFAULT
nvs: Remove flash layout arguments from nvs_init()
Add contributor agreement, update CONTRIBUTING file
Update http_request & https_request examples for new startup flow
Add very simple "hello world" & "blink" examples
Build examples out-of-tree as part of CI process
Examples: Use event groups for waiting until WiFi is associated & ESP has IP
BT example: Enable BT stack in config by default
BT: Relink component on new BT library, auto-initialise submodule if missing
Documentation: Add contributor guide, expand README & add an examples README
Update gitignore for examples
examples: Add https_request example
mbedtls: Add some initial menuconfig options
examples: HTTP request example
component/esp32: udpate wifi lib
component/esp32: modify bool argument name from enable to en
component/esp32: adjust some APIs
esptool: Bump upstream revision
1. move the app demo code to example
2. move the header files to correct path
3. move profile to profiles directory and seperate esp&std
4. some other codes
5. needs continue to cleanup the code
* master: (32 commits)
components/nghttp: rename Makefile to component.mk
components/nghttp: add HTTP2.0 protocol feature
compoenents/esp32: don't alias start_cpu1 to start_cpu0_default
components/freertos: fix a bug with an uninitialised return value
Change application entry point name back to app_main
gitlab-ci: build SSC with matching branch name, if available
components/spi_flash: remove stray level of indentation
components/nvs: fix broken sentences in comment blocks
components/esp32: fix renaming of esp_event_set_cb, minor clean up
components/esp32: remove "_user" part from entry points, weaken start_cpu0/1
Fix a spelling mistake in panic message, add carriage return to stack canary message
components/lwip,esp32: fixes for C++
components/bt: fix compilation, remove ./ from makefile
components/esp32: clarify type of queue in wifi_init_config_t, add default init macro
components/esp32: add ESP_ERROR_CHECK
Event handling refactoring
clean up warnings
components/esp32,bt: fix typos in comments
Startup flow refactoring
Roll back submodule version
...
This change removes implicit WiFi/BT initialization from startup code.
"main" task is started once essential part of startup code is complete.
This task calls application-provided "int main(void)" function, which can call WiFi/BT init functions if necessary.
