Log Message:
www/libreddit: update to latest snapshot.

The project is in maintenance mode since the Reddit API change, which
factually killed third-party apps. Yet, libreddit is still perfectly
usable for a self-hosted private instance which would not hit the reddit
API request threshold.
While it's not clear where the project is headed at the moment, it
appears resonable to pull all the changes and fixes committed since the
last official release.