firebase: support quoted ssid and empty passwords
firebase: support quoted ssid and empty passwords

ed7coyne/firebase-arduino,aliafshar/firebase-arduino,proppy/firebase-arduino,gguuss/firebase-arduino,kskrishnakanth/firebase-arduino,FirebaseExtended/firebase-arduino,gguuss/firebase-arduino,FirebaseExtended/firebase-arduino,FirebaseExtended/firebase-arduino,aliafshar/firebase-arduino,aliafshar/firebase-arduino,gguuss/firebase-arduino