This change adds the release notes for the upcoming 5.0.2 release. This

provides a mix of new features and bug fixes.
Some notable new features include Trojan Source detection settings, API

token time-based expiration, enabling ACL support for diffs for

extensions, and reworked URI templates.
There are also fixes in the diff viewer, crashes fixes for upgrades, and

mimetype fixes for JSON and YAML files.

Built HTML and checked the output.