Make the Aphlict server more resilient.

Summary:
Currently, the Aphlict server will crash if invalid JSON data is `POST`ed to it. I have fixed this to, instead, return a 400. Also made some minor formatting changes.

Ref T4324. Ref T5284. Also, modify the data structure that is passed around (i.e. `POST`ed to the Aphlict server and broadcast to the Aphlict clients) to include the subscribers. Initially, I figured that we shouldn't expose this information to the clients... however, it is necessary for T4324 that the `AphlictMaster` is able to route a notification to the appropriate clients.

Test Plan:
Making the following `curl` request: `curl --data "{" http://localhost:22281/`.

**Before**
```
sudo ./bin/aphlict debug
Starting Aphlict server in foreground...
Launching server:

    $ 'nodejs' '/usr/src/phabricator/src/applications/aphlict/management/../../../../support/aphlict/server/aphlict_server.js' --port='22280' --admin='22281' --host='localhost' --user='aphlict'

[Wed Jun 11 2014 17:07:51 GMT+0000 (UTC)] Started Server (PID 2033)
[Wed Jun 11 2014 17:07:55 GMT+0000 (UTC)]
<<< UNCAUGHT EXCEPTION! >>>

SyntaxError: Unexpected end of input
>>> Server exited!
```

**After**
(No output... the bad JSON is caught and a 400 is returned)

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T4324, T5284

Differential Revision: https://secure.phabricator.com/D9480

resources/celerity/map.php

@@ -476,7 +476,7 @@ return array(
     'rsrc/js/phuix/PHUIXActionListView.js' => 'b5c256b8',
     'rsrc/js/phuix/PHUIXActionView.js' => '6e8cefa4',
     'rsrc/js/phuix/PHUIXDropdownMenu.js' => 'bd4c8dca',
-    'rsrc/swf/aphlict.swf' => 'b7c2d7aa',
+    'rsrc/swf/aphlict.swf' => 'f45c3edc',
   ),
   'symbols' =>
   array(

src/applications/feed/PhabricatorFeedStoryPublisher.php

@@ -176,10 +176,8 @@ final class PhabricatorFeedStoryPublisher {
 
   private function sendNotification($chrono_key) {
     $data = array(
-      'data' => array(
       'key'         => (string)$chrono_key,
       'type'        => 'notification',
-      ),
       'subscribers' => $this->subscribedPHIDs,
     );
 

src/applications/notification/client/PhabricatorNotificationClient.php

@@ -2,7 +2,7 @@
 
 final class PhabricatorNotificationClient {
 
-  const EXPECT_VERSION = 5;
+  const EXPECT_VERSION = 6;
 
   public static function getServerStatus() {
     $uri = PhabricatorEnv::getEnvConfig('notification.server-uri');

support/aphlict/server/aphlict_server.js

@@ -107,8 +107,6 @@ var messages_in = 0;
 var start_time = new Date().getTime();
 
 var receive_server = http.createServer(function(request, response) {
-  response.writeHead(200, {'Content-Type' : 'text/plain'});
-
   // Publishing a notification.
   if (request.method == 'POST') {
     var body = '';
@@ -118,12 +116,20 @@ var receive_server = http.createServer(function(request, response) {
     });
 
     request.on('end', function() {
-      ++messages_in;
-
+      try {
         var msg = JSON.parse(body);
+
         debug.log('notification: ' + JSON.stringify(msg));
-      broadcast(msg.data);
+        ++messages_in;
+        broadcast(msg);
+
+        response.writeHead(200, {'Content-Type': 'text/plain'});
+      } catch (err) {
+        response.statusCode = 400;
+        response.write('400 Bad Request');
+      } finally {
         response.end();
+      }
     });
   } else if (request.url == '/status/') {
     request.on('data', function(data) {
@@ -139,9 +145,10 @@ var receive_server = http.createServer(function(request, response) {
         'messages.in': messages_in,
         'messages.out': messages_out,
         'log': config.log,
-        'version': 5
+        'version': 6
       };
 
+      response.writeHead(200, {'Content-Type': 'text/plain'});
       response.write(JSON.stringify(status));
       response.end();
     });

support/aphlict/server/lib/AphlictListenerList.js

@@ -13,9 +13,7 @@ JX.install('AphlictListenerList', {
     _totalListenerCount: 0,
 
     addListener: function(socket) {
-      var listener = new JX.AphlictListener(
-        this._generateNextID(),
-        socket);
+      var listener = new JX.AphlictListener(this._generateNextID(), socket);
 
       this._listeners[listener.getID()] = listener;
       this._activeListenerCount++;