Improved writeConfigFile() logging.
Improved writeConfigFile() logging.

writeConfigFile() logs key and value for known safe values, and key only otherwise.

meatcar/frontend,mrzen/trovebox,meatcar/frontend,ashwingj/frontend,mrzen/trovebox,EMarcais/frontend,photo/frontend,mrzen/trovebox,photo/frontend,EMarcais/frontend,meatcar/frontend,ashwingj/frontend,mrzen/trovebox,Yetangitu/frontend,photo/frontend,yetixxx83/frontend,EMarcais/frontend,ashwingj/frontend,Yetangitu/frontend,yetixxx83/frontend,meatcar/frontend,Yetangitu/frontend,Yetangitu/frontend,ashwingj/frontend,yetixxx83/frontend,yetixxx83/frontend,EMarcais/frontend,photo/frontend