Clarify that app is being passed to sessions

Author: brycekahle

lib/session.js

@@ -27,21 +27,21 @@ class Session {
     return session;
   }
 
-  static register(req, server, receiver) {
+  static register(req, app, receiver) {
     debug('static register', req.session);
-    return Session._register(req, server, req.session, receiver);
+    return Session._register(req, app, req.session, receiver);
   }
 
-  static registerNoSession(req, server, receiver) {
+  static registerNoSession(req, app, receiver) {
     debug('static registerNoSession');
-    return Session._register(req, server, undefined, receiver);
+    return Session._register(req, app, undefined, receiver);
   }
 
-  constructor(session_id, server) {
+  constructor(session_id, app) {
     this.session_id = session_id;
-    this.heartbeat_delay = server.options.heartbeat_delay;
-    this.disconnect_delay = server.options.disconnect_delay;
-    this.prefix = server.options.prefix;
+    this.heartbeat_delay = app.options.heartbeat_delay;
+    this.disconnect_delay = app.options.disconnect_delay;
+    this.prefix = app.options.prefix;
     this.send_buffer = [];
     this.is_closing = false;
     this.readyState = Transport.CONNECTING;
@@ -54,7 +54,7 @@ class Session {
     this.connection = new SockJSConnection(this);
     this.emit_open = () => {
       this.emit_open = null;
-      server.emit('connection', this.connection);
+      app.emit('connection', this.connection);
     };
   }