Expire tracking after 30ish days (#1744)

* We really don't need to keep this info around forever.
* Indicate in nomenclature

Applies to #1730

Auto-merge

Author: Martii

models/sync.js

@@ -18,7 +18,7 @@ var syncSchema = new Schema({
   target: String,   // Fully Qualified URL target (should be encodeURIComponent already)
   response: Number, // HTTP Status Code
   message: String,  // Any message crafted or static
-  created: Date,
+  created: { type: Date, expires: 60 * 60 * 24 * 30 },
   updated: Date,
 
   // Extra info

views/includes/syncList.html

@@ -35,7 +35,7 @@
     {{^syncList}}
     <tr class="tr-link">
       <td colspan="7">
-        <em>This user hasn't had any tracked syncs yet.</em>
+        <em>This user hasn't had any recently tracked syncs.</em>
       </td>
     </tr>
     {{/syncList}}