Updated mongodb config script to include TTL index to remove stale syncs.

Author: nero120

mongoconfig.js

@@ -1,2 +1,3 @@
 db.newsynclogs.createIndex( { "expiresAt": 1 }, { expireAfterSeconds: 0 } );
-db.newsynclogs.createIndex( { "ipAddress": 1 } );
+db.newsynclogs.createIndex( { "ipAddress": 1 } );
+db.bookmarks.createIndex( { "lastAccessed": 1 }, { expireAfterSeconds: 21*86400 } );