[feature] Introduce server_software option to make LighttpdScriptNameFix more generic?

[XSven]

The challenge that leads to the LighttpdScriptNameFix Plack middleware seems to be applicable to the Apache webserver too under certain circumstances. Unfortunately the SERVER_SOFTWARE condition does not allow me to use this middleware unless I am overwriting the SERVER_SOFTWARE using the ForceEnv middleware. Maybe a server_software option (defaults to lighttpd) could be introduced that makes LighttpdScriptNameFix more generic.

[miyagawa]

This middleware is roughly 10 lines of code and has not been changed for 10 years. I recommend you to copy it to a different piece of middleware and include it in your application.