The only thing it does currently is force the recipients in the low level
connection code to a hard-coded address.

Also:
* Fix the inject command's --filename/-f argument
* Make inject's LISTNAME required
* When inject reads from stdin, capture C-c and print a nicer message
* Extend the members command so that blank lines and lines starting with # are
  ignored.
* members command should not fail when an address is already subscribed.  Just
  warn and continue.