fix building for esp32 core 2.0.8

dplasa / FTPClientServer

Simple FTP Server and Client for the esp8266/esp32 with LittleFS and SPIFFS support

GNU Lesser General Public License v2.1

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Closed vortigont closed 10 months ago

vortigont commented 1 year ago

__FlashStringHelper class is abstract from now on, so use String& instead