POST_morechildren: Don't lookup comments in validator.
Media: Remove truncation of filename hashes.

This was unnecessary and could potentially allow for easier collisions.
Media: Switch to SHA-256 for file hashing.
traffic.top_last_month: Specify how many results to return.
traffic: Split PageviewsBySubreddit for top and specified.
SitewideTraffic: Show top 250 subreddits.
CSS Filter: Add 'cubic-bezier' to SAFE_FUNCTIONS
CSS Filter: Add 'will-change' to SAFE_PROPERTIES

In the browsers that support it, this property will allow for GPU-accelerated animations.
CSS Filter: Add 'order' to CSS SAFE_PROPERTIES

Allow the order property for sorting flex items
Plug several leaks of (username, flair) pairs for deleted users

Thanks to /u/rotorcowboy for the report!