Lots more plumbing

Focusing mostly on getting main in shape and figuring out how to make
the connections flow. The main is pretty much there, going to be a bit
more when I take a shot at federation.

confetti.toml.example

@@ -1,10 +1,15 @@
 hostname = "confetti.example.com"
 port = 53512
+federation_port = 53513
 listen_address = "0.0.0.0"
 certfile = "/etc/letsencrypt/confetti/fullchain.pem"
 keyfile = "/etc/letsencrypt/confetti/privkey.pem"
+media_directory = "/srv/confetti/media"
+statefile = "./confetti.state"
+loglevel = "debug"
 
 [database]
 url = "my.db.server"
 user = "confetti"
 password = "my_secret_password"
+num_connections = 8