backport redis fix #7350

* fix: removal of timeago fallback middleware

Instead of loading English fallback on missing language, we opt
to not send a script tag for a missing language to begin with.

Timeago already loads with English as default, so it will just
continue to use English.

* fix: check userLang against supported language codes

* fix: cleaned up code as per @pitaj

* fix: added comments

* fix: more fixes as per @pitaj

* feat: added addl. test for timeago locales, fixed broken test

install/package.json

@@ -2,7 +2,7 @@
     "name": "nodebb",
     "license": "GPL-3.0",
     "description": "NodeBB Forum",
-    "version": "1.11.1",
+    "version": "1.11.2",
     "homepage": "http://www.nodebb.org",
     "repository": {
         "type": "git",

src/middleware/header.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var path = require('path');
 var async = require('async');
 var nconf = require('nconf');
 var jsesc = require('jsesc');
@@ -16,6 +17,7 @@ var translator = require('../translator');
 var privileges = require('../privileges');
 var languages = require('../languages');
 var utils = require('../utils');
+var file = require('../file');
 
 var controllers = {
 	api: require('../controllers/api'),

src/upgrades/1.10.2/fix_category_topic_zsets.js

@@ -25,6 +25,7 @@ module.exports = {
 							return setImmediate(next);
 						}
 						
+						topicData.postcount = parseInt(topicData.postcount, 10) || 0;
 						db.sortedSetAdd('cid:' + topicData.cid + ':tids:posts', topicData.postcount, tid, next);
 					},
 					function (next) {