WTC rewrite test

This page uses no PHP or WxWeb. Check HTTP status codes as well as the displayed message.

• Ordinary missing route — expected 404 and WTC-TEST-404.
• Malformed local filename — expected 404 and WTC-TEST-404 if our rule runs.
• Same path with trailing slash — expected 404 and WTC-TEST-404 if our rule runs.
• Error document directly — expected 200 and WTC-TEST-404.