NAME
        Plack::Middleware::OptionsOK

SYNOPSIS
        # in app.psgi
        use Plack::Builder;

        my $app = sub { ... } # as usual

        builder {
            enable "Plack::Middleware::OptionsOK";
            $app;
        };

DESCRIPTION
      Many reverse Proxy servers (such as Perlbal) use an 'OPTIONS *' request
      to confirm if a server is running.

      This middleware will respond with a '200' to this request so you do not
      have to handle it in your app. There will be no further processing
      after this