Upgrade Thin from 1.6.1 to 1.7.0.
Includes support for Rack 2. Working toward #14286 (closed).
Changelog: https://github.com/macournoyer/thin/blob/master/CHANGELOG
Includes support for Rack 2. Working toward #14286 (closed).
Changelog: https://github.com/macournoyer/thin/blob/master/CHANGELOG