[BUG FIXES]
- stat already open filehandle rather than filename in Plack::App::File #716
[IMPROVEMENTS]
- Updated MIME type list in Plack::MIME sourced from rack/rack #706
- Avoid try block just for checking $object->isa in HTTP::Message::PSGI #712
- Remove the last remaining uses of base.pm #707
- Document security trust model and frontend configuration for XSendfile middleware