* master: (37 commits)
  BREAKING: Change return EEPROM.end() to bool (esp8266#7630)
  BREAKING: Change return type of channel() (esp8266#7656)
  BREAKING: Change return type of RSSI() (esp8266#7657)
  Add Copyright notice to Schedule.h (esp8266#7653)
  MDNS MultiInterface (esp8266#7636)
  BREAKING: Add Wrong Password wifi status case (esp8266#7652)
  New flash writing method with offset/memory/size alignment handling (esp8266#7514)
  Fix error when debug enabled but no port chosen (esp8266#7648)
  LEAmDNSv2: change a macro name to be independant from LEAmDNS1 (esp8266#7640)
  Allow test framework to use cores/esp8266/Arduino.h directly (esp8266#7377)
  Update OTA HTTP Server Header Information (esp8266#7633)
  Add missing sntp_init/sntp_stop (esp8266#7628)
  Use direct member initialization instead of ctr initialisation (esp8266#7558)
  Prevent rewriting Updater_Signing.h if content unchanged (esp8266#7627)
  Add WiFi Multi to readme.rst
  Remove stray axtls refs, deprecated compat funcs (esp8266#7626)
  Pull deprecated axtls link (esp8266#7624)
  Redesign ESP8266WiFiMulti.[cpp|h]
  Update README.md (esp8266#7623)
  Eliminate code duplication by template for printNumber(...)/printFloat(...).
  ...