Migrate memcached config to standalone configuration.

.gitignore

@@ -7,6 +7,7 @@ pvl.key.txt
 app/config/db.conf.php
 app/config/apis.conf.php
 app/config/influx.conf.php
+app/config/memcached.conf.php
 
 # Junk/cache files.
 *Thumbs.db

app/config/memcached.conf.sample.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Memcached configuration and credentials.
+ */
+
+return array(
+    'servers'   => array(
+        'main'      => array(
+            // Host or IP to connect to (default: localhost).
+            'host'          => 'localhost',
+            'port'          => 11211,
+
+            // Priority for cache storage.
+            'weight'        => 1,
+        ),
+    ),
+
+);

app/library/DF/Cache.php

@@ -179,14 +179,13 @@ class Cache
         $cache_prefix = self::getSitePrefix().'_user_';
 
         if (DF_APPLICATION_ENV == 'production') {
+            $di = \Phalcon\Di::getDefault();
+            $config = $di->get('config');
+
+            $servers = $config->memcached->servers->toArray();
+
             return new \Phalcon\Cache\Backend\Libmemcached($frontCache, array(
-                'servers' => array(
-                    array(
-                        'host' => 'localhost',
-                        'port' => 11211,
-                        'weight' => 1
-                    ),
-                ),
+                'servers' => $servers,
                 'client' => array(
                     \Memcached::OPT_HASH => \Memcached::HASH_MD5,
                     \Memcached::OPT_PREFIX_KEY => $cache_prefix,