Write the example config, including every current config option for every module

We will need to keep this file up to date every time we add a config option or change a default.

I wrote this specifically because Ashton wanted to play around with the server but there was no docs on the config options.
I don't like the way this is worded because it effectively says the module is useless. Either this should be reworded or we should consider changing our hashing algorithm to something that's a bit more secure than MD5.