1. wpa_supplicatn use extra SHA default
2. mbedtls use extra SHA default
3. bootloader use extra SHA default
4. user code can use extra SHA default
Above all, using unified module is easy to maintenance code and save rom or ram.
* Separating MBEDTLS_SSL_MAX_CONTENT_LEN into input and output buffers.
* Beneficial for saving memory by reducing Tx buffer independently of Rx buffer.
* Taken from https://github.com/ARMmbed/mbedtls/pull/536
- fix(esp8266):
- Adding includes for missing symbols.
- Removing unused variables.
- Skip unsupported packing pragmas.
- Add rom_functions.h for symbols that come from the ESP ROM. Add attributes on
ets_printf so GCC will check the syntax of the formatting string and types of
the arguments.
- Add ETS_GPIO_INTR_EN(DIS)ABLE macro.
- Use gpio_output_conf instead of gpio_output_set.
- fix(freertos):
- Define functions that are useful.
- Use correct printf symbols when printing.
- fix(lwip):
- Ignore the warning in sntp.
- fix(mqtt):
- `xTicksToWait` is unsigned, can't check for less than zero. Remove
unused variables.
- fix(newlib):
- `_free_r()` returns `void`, not `void *`.
- Adding includes for missing symbols.
- fix(ssl):
- Make sure functions always return a value.
Merges https://github.com/espressif/ESP8266_RTOS_SDK/pull/188
