Feature: Add the ability to turn on serving of plain http to the world

I needed to be able to serve plain `http`, so I can offload the SSL to a load balancer.
There was no ability to do so in the module, so I added it in this patch.

I have tested that it applies ok, but I have not yet added the ability to turn it off again.
Perhaps I will do so later (if noone beats me to it).

Also, the SSL paths in the jetty.ini template are hardcoded (they match Ubuntu 12.04's paths) and should probably be changed to be variables.