Ivan Grokhotkov 01b185977c brownout detector: enable by default ...

Because of errata related to BOD reset function, brownout is handled as follows:

- attach an ISR to brownout interrupt
- when ISR happens, print a message and do a software restart
- esp_restart_nonos enables RTC watchdog, so if restart fails,
  there will be  one more attempt to restart (using the RTC
  watchdog)

2017-07-10 17:25:55 +08:00

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