Reply format
	(message) (message) \r\n

Message format:
	CODE (tab) Code Name (tab) [ parameter1 [ (tab) parameter2 [...] ] ] [ (tab) comment ] \r\n

Example reply:
	301(\t)Bad Parameter(\t)retry(\r\n)200(\t)Update OK(\t)600(\t)Server status has been updated.(\r\n)(\r\n)

Multiple codes of type 1xx and 3xx can be used, but 2xx, 4xx or 5xx only once.

1xx Informational
	100 Note () // Should be ignored, used to send messages to users etc
	101 Server (version)
	102 Admin (name, email)
2xx Success
	200 Update OK (retry, newvalue) // Operation completed successfully
3xx Warning
	300 Changed paremeter (parameter, newvalue) // An invalid parameter was specified, and clamped or set to a default value
	301 Bad host () // No longer used
	302 Bad zone () // Unauthorized attempt to use a zone or zone does not exist
4xx Client Error
	400 Missing parameter (parameter) // Missing a parameter
	401 Bad parameter (parameter) // An invalied parameter was specified for something with no default value
	402 No Server () // Couldn't connect to the server you provided
	403 Bad Server () // Couldn't retrieve the online list from the server you provided
	404 Too Early () // Ignoring too-early check-in
5xx Server Error
	500 Server error () // An error not the fault of the client caused the process to fail

Unknown codes should be handled as their first digit suggests.