Revert "Fix starting and stopping of SysV init scripts"

This reverts commit c63279630b which
clearly was not needed to fix the problem.  After this revert the
test(s) still pass, but now we can also start bridge-stp, e.g.

     bridge-stp br0 start

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/service.c

@@ -571,7 +571,6 @@ static int service_start(svc_t *svc)
 		} else {
 			i = 0;
 			args[i++] = svc->cmd;
-			args[i++] = svc->cmd;
 			args[i++] = "start";
 		}
 		args[i] = NULL;