feat: add x-real-ip as a secondary header for client ip

Now allows both x-forwarded-for as well as x-real-ip to be used for the client ip, preferring x-forwarded-for

server/server.js

@@ -1677,7 +1677,8 @@ async function shutdownFunction(signal) {
 }
 
 function getClientIp(socket) {
-    return socket.client.conn.request.headers["x-forwarded-for"]
+    return socket.client.conn.request.headers["x-forwarded-for"] 
+            || socket.client.conn.request.headers["x-real-ip"]
             || socket.client.conn.remoteAddress.replace(/^.*:/, "");
 }