I am having problems with proxy being unable to store pages that do
not have a file extension (such as a directory or "nice url").
1. User requests http://domain.com/page/hello/
2. nginx looks in the root, can not find the page.
3. nginx uses the error page, which then calls a proxy pass inside a location
4. nginx fetches the page.
5. nginx cannot save the results, because it is /page/hello/
nginx does create the /page/hello/ directory inside the proxy_store
It could very well be a problem with my configuration. It works for
urls with file extensions.