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.
You don't have to use "tcp6"; just "tcp" will work fine.

The description and example don't quite match up here, which can be confusing.  While the colons must be escaped with backslashes, we add brace notation in txircd and do the escaping ourselves because otherwise it gets too unwieldy (especially when sockjs is added).