Handle Multi-Line SSE Messages

[rdnn]

PsychicHttp/src/PsychicEventSource.cpp

Lines 217 to 221 in b719b48

	if(message != NULL){
	ev += "data: ";
	ev += String(message);
	ev += "\r\n";
	}

Sending multi-line data over SSE does not work as intended. Even though the content of the message is transmitted successfully, the client cannot decode the message as each new line needs to be prefixed with data: .