Merge from vendor branch TNF:

Merge from vendor branch TNF:
Initial import of p5-Plack-Middleware-ReverseProxy version 0.06 in
the NetBSD Packages Collection.

The Perl 5 module Plack::Middleware::ReverseProxy is a Plack
middleware. It resets some HTTP headers, which were changed by
reverse-proxy. You can specify the reverse proxy address and stop
fake requests using 'enable_if' directive in your app.psgi.