Easily compile Nginx with extra modules (Deb/Ubuntu)

I was checking out how to add module pagespeed's and HTTP Upload modules into Nginx.

Nginx requires recompiling to add modules. You can do that manually, but when you do, you may lose out on the setup you get with a apt package such as sysv/upstart, logging and so on.

Turns out the process to modify and existing package isn't too painful! Here it is.