Review Board 1.7.20 released

Review Board 1.7.20 is out. It's primarily a small bug fix release, fixing a couple crashes, reducing constraints on usernames, and fixing the annoyance with JSON fields in the administration UI.

It's a small release, but as always, we recommend it. The JSON fixes in the administration UI alone should solve a lot of issues people have been hitting.

See the release notes for more information.