This release includes improvements against HTML injection attacks.
API-Incompatible Changes
- `rouver.html`: `http_status_page()`: The `message` argument will now
be HTML-escaped. Instead, an `html_message` argument was added.
`content` was renamed to `html_content`.
Bug Fixes
- `rouver.html`: Harden all functions against malicious input.
- `rouver.router`: Correctly HTML-escape error messages.