Plack::Handler::AnyEvent::FCGI(3pm) on Linux

The text 2d94b9b5f6a6, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.

Asynchronous FCGI handler for PSGI using AnyEvent::FCGI

Plack::Handler::AnyEvent::FCGI(3pm) on Linux now