The generic term for a non-running service is blocked, but a service may
be blocked for several different reasons. When a user stops a service
with `initctl stop` the intuitive expected output from `initctl show` is
"stopped" not "blocked".
When the user later restarts the service with `initctl start` it may of
course be blocked due to wrong runlevel or a missing condition. As can
be expected from the service's configuration.
The rest of the patch refactors the internal API names a bit to reflect
this change.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>