mailman: error: A previous run of GNU Mailman did not exit cleanly. Try using --force.
Deleting all files in ./locks enables me to start it again.
** Affects: mailman
I think this is user error. `bin/mailman start` is just a little front-
end that forks and execs the actual master script. This runs in the
background and detaches itself from the controlling terminal, so exiting
the terminal is not meant to stop the master, or any of its own
subprocesses. I think the locks aren't getting deleted because
everything's still running.
You should not use --force in this case. Only use --force when you know
the master is no longer running. Use `bin/mailman status` to find that
out. In your case, just open up a new terminal and run `bin/mailman
stop` and everything should work properly.