If you do this, be sure to configure your firewall properly such that only
trusted machines on your network can access your development server.
### Changed status option symbols for `render`
Due to a [change in Rack](https://github.com/rack/rack/commit/be28c6a2ac152fe4adfbef71f3db9f4200df89e8), the symbols that the `render` method accepts for the `:status` option have changed:
- 306: `:reserved` has been removed.
- 413: `:request_entity_too_large` has been renamed to `:payload_too_large`.
- 414: `:request_uri_too_long` has been renamed to `:uri_too_long`.
- 416: `:requested_range_not_satisfiable` has been renamed to `:range_not_satisfiable`.
Keep in mind that if calling `render` with an unknown symbol, the response status will default to 500.
### HTML Sanitizer
The HTML sanitizer has been replaced with a new, more robust, implementation
