RedHat: Return status values from client init

RedHat: Return status values from client init

The init script provided with OpenAFS always returns 0 when the status
subcommand is called, even if the service is not running.

For example:

$ sudo service afs status; echo $?
afsd is stopped
0

This change makes sure the init script exits with the value returned
by the status function from /etc/init.d/functions. With this patch,
the afs init script behaves as expected when used, for example, in a
Chef service resource:

$ sudo service afs status; echo $?
afsd is stopped
3

Change-Id: If3d317fc406746f357e29e0d8d82c7ccf3c192d7
Reviewed-on: http://gerrit.openafs.org/5123
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>