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/cond-w.c

@@ -218,7 +218,7 @@ static int do_delete(const char *fpath, const struct stat *sb, int tflag, struct
 		err(1, "Failed removing condition %s", fpath);
 
 	cond = ptr + strlen(COND_BASE) + 1;
-	if (sm_is_in_teardown(&sm))
+	if (sm_in_reload())
 		cond_clear_noupdate(cond);
 	else
 		cond_update(cond);