Refactor state machine control functions

This refactor should have been done years ago when we first introduced
the big state machine.  The old functions service_runvel() and the oddly
named service_reload_dynamic() are actually state machine control fns,
so let relocate them.

Also in this commit, remove the global variable 'sm' and rename a few of
the critical functions to better names.

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

src/finit.c

@@ -745,8 +745,8 @@ int main(int argc, char *argv[])
 	 * Initialize state machine and start all bootstrap tasks
 	 * NOTE: no network available!
 	 */
-	sm_init(&sm);
-	sm_step(&sm);
+	sm_init();
+	sm_step();
 
 	/*
 	 * Enter main loop to monitor /dev/initctl and services