Make instantiated updaters configurable #2
Description
Right now, all updaters that are available will be instantiated when the service is started. While this is a sane default, in most cases, only a subset of the available updaters is actually used or available. Therefore, I would like to pass a list of updaters to the service at start time, e.g. via a configuration file or command line. All updaters not included in that list should not be invoked when the service receives an update command.